More Menu customization?

I followed the guide to make the start menus in my game and I wanted to do a couple more things to it. Is there a way to modify the way the number of items count is displayed? Right now, it just has the number on the for right side of the menu box. I want it to be something like x%n. So instead of "Cure Potion 6" it would say "Cure Potion x6".