$sql="SELECT * FROM dede_arctype where topid=0 and ishidden = 0 order by sortrank asc,id asc";

$dsql->SetQuery($sql);

$dsql->Execute();

$topids= array();

while($arr = $dsql->GetArray())

{

    $typeurl = GetOneTypeUrlA($arr);     //獲得欄目地址

}