Building menus in Bootstrap is complicated. And boring because you’ll have to write the same stuff over and over again. Perhaps you could write some PHP functions to do the trick. But what is somebody else developed the tools?
So I began to google for Bootstrap tools. Here’s a usefull tool for menu building:
In this builder you can build the menus. Drag and drop to submenus ( the menu item will indent a bit ). The HTML and CSS will be made automaticly. There are even some gradient options. But here I’d prefer to craft the stuff myself via SASS / Compass or even plain CSS.
If you build a menu, you can download the HTML and CSS. Include this via PHP and you’re up and running in no time.
So why not try the Bootstrap Design Tools?