I implement bootstrap css in my project .everything is working fine but i was unable to make dnn menu responsive using bootstrap css please provide some solution for responsive dnn menu

You said nothing about how you implemented the menu.

I recommend that you view our tutorials on DNN Menus and on using Bootstrap within DNN:

How to Create a Custom DNN Skin with Bootstrap 3
How to Create Custom DNN DDR Menu XSLT Templates

You will find the links here: http://www.dnncreative.com/Home/Lat...ideos.aspx