Reply To: Trying to get the dropdown to appear behind the main nav, so the nav box shadow

[Shikkediel]

Something like this?

http://www.bootply.com/vcCJkwyjVB

For the neutral reader, the two most right navigation buttons of the larger block on the left work when they are clicked. And I suspect OP wants the box-shadow to be on top of the dropped down items. Which was a bit trickier than I anticipated on. But I do believe it needs a separate element.