Код который выводит кол-ва тем
<span style="font-size: 15px;">{{$where[] = "starter_id = " . $comment->author()->member_id;}}
{{$author_topics = \IPS\forums\Topic::getItemsWithPermission( $where, NULL, 0 );}}
{{$topics_count = count($author_topics);}} {$topics_count}</span>