One of the more efficient ways to handle current navigation highlighting is to give each of your navigation items a unique class name. Then give each page a unique ID on the body element. Then CSS can control what each navigation item looks like based on that body ID. But what if you are using a CMS like WordPress which includes that body tag as part of a template? In this case, we can use PHP to look at the URI of the page and create the ID based on that. Nifty trick!