A basic and properly structured HTML/CSS drop down menu can serve you just as well. In fact, it may make your site appear more responsive to not use animations and instantly display the menu instead.

Locate the lines for "#navigation" and ".sub-menu". You will want to change the "sub-menu" list item class to float left and display as inline to make this tier horizontal.

How to Make a Collapsible Toggle Menu in Blogger. One of the quickest ways to add a collapsible menu to a website or blog is to place menu items in an HTML div block.