Dynamic Menu Highlighting with WP 3 Menus

Hello,

I was following the instructions on how to make a dynamic menu highlight using method 2: https://codex.www.ads-software.com/Dynamic_Menu_Highlighting and I was wondering how I could do this when using the menu feature in WordPress? For example, if I were to enter my menu items in the WordPress dashboard, how could I still add an id of “current” for the menu item currently selected?

Thanks,
Connor