Podes probar asi:
Código PHP:
Ver original<table cellpadding="0" cellspacing="0" width="751" height="169">
<?
$resulttag = mysql_query('SELECT * FROM tags WHERE id_usuario=\''.$idrow.'\''); $i = 0;
// Si es impar, empiezo fila
if ($i % 2 != 0) {
echo "<tr>";
echo "<td valign='middle' height='130' background='colortags/" . $tagg[2] . ".png'>" . $tagg[3] . "</td>";
} else {
// Si es par, agrego columna par y cierro fila
echo "<td valign='middle' height='130' background='colortags/" . $tagg[2] . ".png'>" .
echo "</tr>";
echo "<tr>";
echo"<td width='357'> </td>
<td width='37'> </td>
<td height='39' width='357'> </td></tr>";
}
$i++;
}
?>
</table>