Help with mobile version navigation

Hi everyone,
I’m building a new website for my Pimp My Wheelchair Project using the Carzine Theme and I’m having issues editing how it shows on mobiles. At the moment on the desktop version I have a page for each mod that I have on my wheelchair, these show on the right hand side. I then have a couple of links that have nothing else to do about mods along the top.

The problem I’m having is that on the Mobile version of the site the Menu drop-down only shows the links from along the top. All the links to do with the mods are down the bottom of the page.

Is it possible to get the drop-down menu to show both the links from the right and the links along the top?

https://www.pimpedwheelchair.co.uk