echo <<<HTML
<table>
<tr>
HTML;

while($blah = mysql_fetch_array($blah)) {

if($rowcount % 3 = 1){
echo "<tr>";
}

echo $blah['content'];

if($rowcount % 3 = 1){
echo "</tr>";
$rowcount = 0;
}

$rowcount++;

}

echo <<<HTML
</tr>
</table>
HTML;