dedecms织梦怎么判断某个栏目是否有子栏目

{dede:field name=typeid runphp="yes"}
global $dsql;
$sql = "SELECT id From `dede_arctype` WHERE reid='@me' And ishidden<>1 order by sortrank asc limit 0, 100 ";   
$row = $dsql->GetOne($sql);      
@me=is_array($row)?'有下级':'没下级';