Promobile support Left & Right menu locations. You should create two menu areas by using “Appearance > Menus” page.
1-) Click “Create A New Menu” and create 2 menu named “Left and Right Menu”.
2-) Add items to your menu.
3-) Select menu location like image below from “Manage Locations” section.
Note: This section is important. You can’t see left or right menu without select locations.