Hi Dorian. It's a bit complicated trying to edit the code for navigation in particular. Or so it seems based on the posts I've come across. What does the widget do exactly? I'm looking at your site and trying to understand how someone would add a particular package through something in the navigation link. It might make more sense just to add your widget to the "product" pages? Or just set up your store through Weebly instead of using the third party. 
