Exclude the category in Wordpress

Question

My question:

This code retrieves the categories. I need to exclude the category number:81. Is there an easy way to exclude it in this code?

<?php   
            $cat_lists = retrieve_cat_data_sp( get_option('bn_exclude_home_lists') );

            for ($i = 1; $i < count($cat_lists); $i++ ) {

            if( (get_category( $cat_lists[$i] )->count) > 0 ):
        ?>

Answer 1

If retrieve_cat_data_sp is the function from this question then that returns categories except the ones given in the argument:

$cat_lists = retrieve_cat_data_sp('81');

It essentially a wrapper for get_categories. So to exclude multiple Ids

$cat_lists = retrieve_cat_data_sp('81,82');

If you want to exclude 81 as well as those IDs listed in get_option('bn_exclude_home_lists') then, assuming that option returns something in the form of comma separated IDs '12,13,36':

$exclude = (get_option('bn_exclude_home_lists') ? get_option('bn_exclude_home_lists'):'');
$exclude .=',81';
$cat_lists = retrieve_cat_data_sp($exclude);