something like this: ?

<?php 
while ($data = mysql_fetch_assoc($requeteID)) 
{ 
  $movies .= '<option value="'.$row['id'].'"'; 
  $movies .= ($row['id'] == $_GET['id'] ? ' selected>' :'>'); 
  $movies .= $row['title'].'</option>'; 
} 
echo $movies; 
?> 
</select>