<?php
$result_a=mysql_query("select * from product_tag where product_id=$row[id]");
$num = 0;
$num = mysql_num_rows($result_a);if(!$num == 0){?><td><div style="padding-left:40px;">Sport：</div></td><td><?php while($row_a=mysql_fetch_array($result_a)) { $row_b=mysql_fetch_array(mysql_query("SELECT * FROM `tag_tag` WHERE id=$row_a[tag_id]")); if($row_b[classid]==5) { echo $row_b[tag_name]; } }?></td><?php}?>