Hello,
You can use static blocks to display required menus https://prnt.sc/io664z edit the mega menu content by editing the Static blocks http://prntscr.com/io66gb (go to Visual Composer > Role manager and enable composer for the Static Blocks http://xstore.helpscoutdocs.com/article/47-static-blocks https://xstore.helpscoutdocs.com/article/27-mega-menu)
Regards
