<?php
    $count = 10;
    $group = 4;

	for ( $i = 1; $i <= $count; $i += $group ) {
	    echo '<div class="row">' . "\n";
	    for ( $j = 0; $j < $group && $j + $i <= $count ; $j++ ) {
	    	echo "\t" . '<span>'.($j + $i).'</span>' . "\n";
	    }
		echo '</div>' . "\n";
	}
?>
