Exclude the category in WordPress

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);