foreach.php

<?php
foreach ($images as $index => $image) {
  if ($index % 3 == 0) {
    echo "<div class='yox_row'>";
  }

  echo "<div class='yox_cell'>";
  echo get_resource_link($image);
  echo "</div>";

  if (($index + 1) % 3 == 0) {
    echo "</div>";
  }
}
?>