Have you ever wondered how exactly you could choose which categories do and which don’t display your advertisements? Maybe you have a Sponsored Review category and want to make sure that all posts filed in that category don’t display any ads.
This is something that you as a user of WordPress have the ability to do without to much effort. What you need to do is paste the following code into your blog around your advertisement code:
<?php if ( !in_category(10) && !in_category(11) ) { ?>
This is your existing advertising code.
<?php } ?>
Where it says 10 and 11 you will want to place the number assigned to your categories that you want to censor advertisements from. You can repeat where it says ’&& !in_category(12)’ as needed until you’ve censored all categories.
Enjoy!
Kyle Eslick
Kyle Eslick is WordPress enthusiast who took his passion for WordPress to the next level back in 2007 by launching WPHacks.com as a place to share hacks and review WordPress-related products.
May 2012, and still a useful post. That's good value! 
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