In order to add the menu as your requirement, please add your customized code to
+ In PC version: Add code to file header.php before line 69 http://i.imgur.com/OHxwI87.png
+ In Mobile version: Add code to file mobile/header.php before line 20 http://i.imgur.com/5E9aoGa.png
Regarding the specific code, it would be your customized work and outside the scope of the support that we can offer.
All the best,