[nerbert]

Duh! It should be looking for html instead of bb code. Try this:

PHP Code:

if($post['posts'] < 30)  
{  
    $post['message'] = preg_replace("/<a[\s\S]*?\/a>/i", "LINK REMOVED", $post['message']);  
} 


--------------- Added [DATE]1368545302[/DATE] at [TIME]1368545302[/TIME] ---------------

Note the Warning at the top in your screen shot. Go to your Options and find Plugin/Hook System and turn it on