$saticisorgu = mysql_query("SELECT * FROM satici");
while($saticiyaz = mysql_fetch_array($saticisorgu)){
$saticiadi=$saticiyaz["SaticiAdi"];
$satici_id = $saticiyaz["id"];

$select = "";
if($satici_id==$duzenlenen_satici_id) { $select = " selected='selected'"; }

echo "<option value='$saticiadi'$select>$saticiadi</option>";
}