if($topics['topic_user']){

话题人物推荐

{:W('TopicUser',array('topic_id'=>$topics['topic_id'], 'type'=>1))}
}

参与该话题的人

{:W('TopicUser',array('topic_id'=>$topics['topic_id'], 'type'=>2, 'limit'=>8))}
{:W('TopicList',array('type'=>1, 'limit'=>10))}