Wordpress Bug Fix

Looking for someone skilled in javascript to do this today. I wrote some php/jQuery that adds dynamic content after every third row. When user scrolls down, an infinite scroll script loads additional rows, we need content added after every third row which loads on scroll. So ultimately no matter how many rows are loaded via infinite scroll the content gets added after every third row. I'm thinking you may need to add an event trigger to the infinite scroll script which fires the jQuery function to add content after each section loads on the infinite scroll. You may have a better approach in mind.