Is there a way to make a phone number in the secondary nav clickable for mobile devices?

When I add the code:

<a href="tel:8602630009">Call Us: (860) 263-0009</a>

It breaks the secondary navigation and I get this:

http://prntscr.com/6ai5my

The problem was I put the whole link code

<a href="tel:+18042221111">Test Call</a>

into the nav label field.

putting tel:+18042221111 into the URL field fixed it.