how to create dynamic tab from today value

hi,
I have date field name is tarih,

$sql = "select * from mytable";
$rs = CustomQuery($sql);
while ($data = db_fetch_array($rs)) {

$pageObject->addTab("tarih='".$data["tarih"]."'",
date('d.m.Y',$data["tarih"]), $data["tarih"]);
}
but not working

how to create dynamic tab from today value?

thnx.