I want PHP to organize a certain number of items in a row of a table and jump to the next row.

This is my table:
Code:
<?php do { ?>
  <table cellspacing="0" cellpadding="0">
    <tr>
      <td><a href="<?php echo $images_dir ?>/<?php echo $row_call_photos['photo_filename']; ?>" target="_blank"><img src="<?php echo $images_dir ?>/tb_<?php echo $row_call_photos['photo_filename']; ?>" border="0" /></a></td>
    </tr>
  </table>
  <?php } while ($row_call_photos = mysql_fetch_assoc($call_photos)); ?>
Help and leads will be greatly appreciated.