[_ck_]

If you mean so topics in sub-forums do not show up on “latest discussions” I whipped this up to solve that:

function filter_front_page_topics($where){

// $exclude_forums=array ("8");   // enable this to manually specify specific forums by id #

$forums = get_forums(); foreach ($forums as $forum) {if  ($forum->forum_parent) {$exclude_forums[]=$forum->forum_id;}}  // exclude ALL sub-forums

if ( is_front()) {foreach($exclude_forums as $forum) { $where.=" AND forum_id != ".$forum."  "; }}

return  $where;

}

add_filter( 'get_latest_topics_where', 'filter_front_page_topics');

add_filter( 'get_latest_posts_where', 'filter_front_page_topics');