Just to confirm - you want a fully responsive menu bar which is similar to the Flipkart menu bar in UI as well as behavior.
I have worked in areas related to websites and web development for the past five years - be rest assured you will like what you see.
Apart from adding the HTML code that I provide you with, you will have to also add some CSS to your CSS file. You may also provide me with some sample code of your CSS file, especially if it is a fully / semi responsive CSS - this will be useful to me for testing.
For any further discussions, please feel free to contact me on Freelancer for more details.