<div class="wrap"></div>
$('.row-module .product-layout.product-grid:nth-child(4n-3), .row-module .product-layout.product-grid:nth-child(4n-2), .row-module .product-layout.product-grid:nth-child(4n-1), .row-module .product-layout.product-grid:nth-child(4n)').wrapAll('<div class="wrap"></div>');