DEDE获得顶级栏目名称

function GetTopTypename($id)
{
    global $dsql;
    $row = $dsql->GetOne("SELECT typename,topid FROM dede_arctype WHERE id= $id");
    if ($row['topid'] == '0')
    {
        return $row['typename'];
    }
    else
    {
        $row1 = $dsql->GetOne("SELECT typename FROM dede_arctype WHERE id= $row[topid]");
        return $row1['typename'];
    }

}

{dede:field name='typeid' function="GetTopTypename(@me)" /}