I followed all the steps and the result is: both menus, contact and shirt are underline?

I found that you need to add the $section variable to index.php as well but with a value of $section = " "; or an empty string. For some reason when on the home page I was getting a big white blob in my nav.

It took me a minute to figure this out but finally I realized that prior to the introduction of the variable everything was fine and that only the home page was lacking it. Since the homepage would never require the condition of "on" I gave the variable no value and this resolve my issue.

I hope this helps others who might be confused by a busted nav after following the instructions to the letter.