织梦cms子栏目或内容页怎么调用所在顶级栏目的栏目名

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)” /}