We are slowly but surely changing the menu bar through the site. We had the site set-up since the first build as a top menu bar. Since most people use a cell phone when viewing the site. The side menu is more compatible with smaller devices. I personally use laptop to build the site. So the whole site was built on a computer and it looked good. Never really looking at the site through my phone. Now that I was trying to view and use the site on my phone. I found it was not that easy. 

So changing the site to use the side menu will take a little time but getting it done.