I've got a custom loop that excludes groups by using this code:

query_posts(array('category__not_in' => array(2,6)));

Rather than indicating the groups to exclude within the code, Let me have the ability to set the choice during my custom theme options menu. The code to call the choice is get_option('ex_cats');. How do you refer to this as during my query_posts statement?

what's the creation of get_option('ex_cats'); ?

what about this question_posts(array('category__not_in' => array(get_option('ex_cats'))))

or $felines_id = get_option('ex_cats') query_posts(array('category__not_in' => array($felines_id)))

i suppose get_option('ex_cats') will return a string value.