This is a good idea! Ask moderator for move your MOD into Mods & Plugins (Requests & Discussions)
For modifications use this format:
Open /includes/functions.php
Find:
$sub_cat_list .= "<a href=\"".$sub_url."\" class=\"subcat\">".format_text($cat_cache[$subcat_id]['cat_name'], 2)."</a>";
if ($i != $config['num_subcats'] && $i < $config['num_subcats'] && $i < $num_subs) {
$sub_cat_list .= ", ";
Replace with:
$sub_cat_list .= "<b>.</b> <a href=\"".$sub_url."\" class=\"subcat\">".format_text($cat_cache[$subcat_id]['cat_name'], 2)."</a>";
if ($i != $config['num_subcats'] && $i < $config['num_subcats'] && $i < $num_subs) {
$sub_cat_list .= "<br> ";
Enjoy, CanonInk