Hi there, I’ve run into similar issues. This article helped me out a lot:
http://stackoverflow.com/questions/936242/php-how-do-you-determine-every-nth-iteration-of-a-loop
You’ll need to start a counter just above your while loop:
$counter = 0;
You should be able to drop an if statement into your while loop:
if ($counter % 4 == 0) {
// code here
}
Then just before your closing endwhile; you’ll need to advance the counter:
$counter ++;
The if statement will evaluate to true every 4 iterations of the loop.