After getting the page built, I realized all of the “child” categories I use for the WordPress Hacks theme was causing some problems, so I decided to remove them from the display.   After all, these posts can also be found in their parent category. 

If you are displaying your categories somewhere and would like to remove the children, here is the code you’ll need (for WordPress 2.5+):

<?php wp_list_categories('title_li=&depth=1&show_count=1') ?>

The depth=1 is the important one for the purpose of this hack as it is what tells WordPress not to display more than your parent categories.   By default, it is of course set to depth=0 (shows all categories).   If you are wondering what other options you have, here is what the WordPress Codex lists for the depth parameter:

• 0 – All Categories and child Categories (Default).
• -1 – All Categories displayed in flat (no indent) form (overrides hierarchical).
• 1 – Show only top level Categories.
• n – Value of n (some number) specifies the depth (or level) to descend in displaying Categories.

If you’d like to build drop-down boxes for your categories and archives on your WordPress blog, here is the code you need:

Archives Drop-down Code

<select name=\"archive-dropdown\" onChange='document.location.href=this.options[this.selectedIndex].value;'>
<option value=\"\"><?php echo attribute_escape(__('Select Month')); ?></option>
<?php wp_get_archives('type=monthly&format=option&show_post_count=1'); ?> </select>

Categories Drop-down Code

<form action="<?php bloginfo('url'); ?>/" method="get">
<?php
$select = wp_dropdown_categories('show_option_none=Select category&show_count=1&orderby=name&echo=0');
$select = preg_replace("#<select([^>]*)>#", "<select$1 onchange='return this.form.submit()'>", $select); echo $select; ?>
<noscript><input type="submit" value="View" /></noscript>
</form>

I think something like this can be a good idea if done with the right theme, but I have also seen it on a few sites where it didn’t look very good, so keep that in mind if you decide to move your categories and archives to a drop-down box!

To see other code snippets we’ve featured here over the past year, check out our WordPress Code page!

I make it a point to engage in discussions regularly with my fellow bloggers about a variety of topics I have an interest in, including blogging, affiliate marketing, internet real estate, etc.   One thing I always like to find out from fellow WordPress users is whether or not they’re using the tag system that was introduced in WordPress 2.3.   What I’ve found are some very diverse responses, ranging from them not understanding how tags work, to some people that actually prefer to just use tags instead of categories.  Of course in the middle are the people that are attempting to use both.

I personally use categories on all of my sites, but only choose to use tags on a few of them.   For the ones that I do use tags on, I make sure to use the Recommended Tags WordPress plugin so I don’t go overboard with the tags I use.

I’d love to get your take on this.  Do you use categories and/or tags on your blog?

If you are looking for a category number (this is most often needed for setting up the homepage of Magazine WordPress themes), here is a really easy way you can locate it until the WordPress team adds the category number display we all took for granted before:

1) Go to Manage > Categories.

2) Hover your mouse over the category that you need the ID of.

3) Look in the lower left corner of your web browser for the ID of that category.

Here is a screenshot example:

Hopefully WordPress will again display the category ID in one of the future updates, but thankfully this workaround is really easy.

• Track WordPress 2.6 Progress – Quick Online Tips gives some suggestions on how to keep up with the progress of WordPress 2.6.
• How to Create a Dynamic Sidebar – This is something we’ve covered on a couple different occasions here on this site, but I wanted to point out this post because I think Richard does a great job of explaining how to tell WordPress what to display on each page.
• Project M Finally Announced – Justin Tadlock finally announced the details of his Project M. It appears it is a theme club of sorts, but with a twist. Click over to get the details.
• Do It Yourself WordPress Theme – Hayes Potter has come up with an interesting idea by releasing a WordPress theme. Simply build your stylesheet and you are done.
• WordPress Tricks – Stylized Web offers some useful PHP code snippets for WordPress.
• Making Authors Template Page – Also from Justin Tadlock, this post does a great job detailing how to make a WordPress authors template page.
• Displaying Related Categories and Content in WordPress – Darren Hoyt shares the code he used to make this feature in his popular Mimbo Pro theme.

• CagIntranet explains how to create a category loop to display those posts in your sidebar. Chris Pearson has also written a great post about the ideal way to use your blogs categories.
• Weblog Tools Collection has done a final WordCamp Dallas 2008 wrap up. The post includes notes and pictures from the event (including pictures of the WTC authors!)
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• Theme Lab provides a great tutorial guiding you on how to put your available domains to good use. I have about 200 domains I’m not currently using and I’ve been trying to figure out if I should sell them or start using them. If done tastefully and legally, this could be a great use for these domains.
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• Performancing explains how to use WordPress custom fields to auto-embed YouTube videos.

Instead, I’ve always liked the idea of showing only the post titles on your category pages. If you are good at making post titles, this should help someone navigating your categories to find what they are looking for.

First, you’ll want to open your archive.php file and find the post loop. It usually starts with this code (or something similar):

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

You’ll want to delete everything from that code down to the end of the loop, which usually ends with this:

<?php endif; ?>

Now, you’ll want to replace the post loop code with the following slightly different code loop:

<?php $temp_category = single_cat_title('',false); if (!empty($temp_category)){ // give index ?>
<h1><?php single_cat_title(); ?></h1>
<p><?php echo(category_description(the_category_ID(false))); ?></p>
<?php if ($posts) : foreach ($posts as $post) : start_wp(); ?>
<li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li><br>
<?php endforeach; else: ?>
<p><?php _e('Sorry, no posts matched your criteria.'); ?></p>
<?php endif; ?>
<?php }else{ // give details or single post ?>
...... code for normal post overview
<?php } ?>

And you’re done! You can add<li>, <ol>, and whatever else as needed, and then style your archives page in your stylesheet to get the look you’re trying to achieve.

If you are interested in moving your WordPress categories into a menu and then displaying sub-categories in a drop-down menu, Anthology of Ideas has taken the time to write a detailed post explaining how to display WordPress categories in a horizontal drop-down menu.   You can also view their menu to see if you like it.  I recommend you check it out before attempting this on your own.

Of course doing this will require the use of Javascript, but the author does a great job of detailing the process and provides the CSS required to style it properly.  Once you have everything up and running correctly, you can then adjust the colors and margins to give your new menu the look and feel you want it to have, as well as fully integrate it into your WordPress theme.

I like the idea of having the sub-categories be drop-down menus, but one downside I see is that displaying categories in a menu sort of eliminates using a traditional menu for your pages.  It would be hard, in my opinion, to achieve a good look with more than one menu, so you then have to find a different way to display your blog pages.   I think you are probably best off using this method mostly if you are trying to achieve a magazine-style look or some sort of a content management system (CMS).

What do you think of moving your categories to a menu and displaying your sub-categories in drop-down boxes?

<?php if(is_archive()){ ?><meta name="robots" content="noindex"><?php } ?>

You’ll want to grab that code and paste it anywhere in the header of your theme above the closing of the head tag. That way, Google will not index these, and search engines won’t refer traffic to your archive pages instead of your single post pages.

The old code still works, but it doesn’t let you take advantage of the new blogroll capabilities.  If you have set up your blogroll with different categories, but noticed that all of them display under a single category, it is probably because your blog’s theme is still using the original code that didn’t allow for much configuration. You’ll probably find something like this:

<?php get_links()' ?>

or

<?php get_links_list()' ?>

If you want a more configurable code, you will want to use something like the following:

<?php wp_list_bookmarks('categorize=1&before=<li>&title_before=<h2>&title_after=</h2>&category_before=</n>&category_before=</n>&after=</li>&orderby=url'); ?>

This code will display your blogroll, but will let you have separate lists for your different blogroll categories. I’ve customized it to display the category title as a Header 2 and use bullet points to display the content, but you can do a variety of things. For more customization options, you’ll want to check out the WordPress List Bookmarks page and adjust the code as needed.