tsar, на
<?php

$num = 0;

for ($i = 1; $i <= 3; $i++)
{
echo '<div class="row">'."\n";

for ($i2 = 1; $i2 <= 3; $i2++)
{
echo '<div class="col-xs-6">'. ++$num .'</div>'."\n";
}

echo '</div>'."\n";
}

?>

tsar,
<?php

for ($i = 1; $i <= 3; $i++)
{
echo '<div class="row">'."\n";

for ($i2 = 1; $i2 <= 3; $i2++)
{
echo '<div class="col-xs-6">xxx</div>'."\n";
}

echo '</div>'."\n";
}

?>