Menu icon Foundation
How to set Right alignment for drop down content

I create a right alignment div and set drop down content. Now I want to set drop down content right alignment but it always show left alignment. So please, any one tell me how can change drop down content alignment. Thanks

dorpdownmenualignment

I create a right alignment div and set drop down content. Now I want to set drop down content right alignment but it always show left alignment. So please, any one tell me how can change drop down content alignment. Thanks