ifightcrime/bootstrap — comment on commit 02c6ac7845685d9899932b8a675949cb5ac2780f
File:  line 0
By mindctrl:

Top/Bottom.

If you start out with a menu like this that has dropdowns - http://i.imgur.com/FcTg3.png

When you collapse it, and open the dropdown, it looks like this - http://i.imgur.com/rlQok.png