Custom Button Code in Header

Using 7.1, is it possible to add custom code to a link in the header?  I have code for a reservation popup widget, and in 7.0, I could paste that code as a header link and it would display the button. Now in 7.1, it just shows the code as text in the header. I've tried code injection in the header but that doesn't seem to work. I do have the button option enabled for the header, but that just redirects to another page. I would prefer to have the popup widget. Thanks!

For reference: www.ConnersKitchenAndBarFW.com

Can you paste custom code here? We can test easier

Click this icon then paste code

Yes, you can target links directly based on their destination, and apply custom code to them.

.header-nav-item a[href="/yourslug"], .header-menu-nav-item a[href="/yourslug"] {

// * Custom code goes here * //

}