Bootstrap dropdown menu 3 levels

Question

I have a left dropdown menu with bootstrap, I need to deploy the third level (Submenu 1, 2, 3, 4) on the right side of the menu, in this way:

Services

     Submenus      Submenu1
                   Submenu2
                   Submenu3
                   Submenu4

I have achieved dropdown vertically below submenus

Services

     Submenus     
     Submenu1
     Submenu2
     Submenu3
     Submenu4

Here is the menu Bootply

Please help me! :)

Answer 1

Try changing:

.nav-side-menu { overflow:visible }
.nav-side-menu ul ul ul { position:fixed; left:300px; top:0; }