Mega Menu in SharePoint

Mega Menu in SharePoint 
You can follow below steps to create Mega Menu

Create a custom list with all columns

http://blog.sharepointexperience.com/2013/05/mega-menu-for-sharepoint-part-2/

Download XSL

http://spexp-blog-files.s3.amazonaws.com/NBB/megamenu.xsl

Download CSS

http://spexp-blog-files.s3.amazonaws.com/NBB/megamenu-part3.css

Create a new webpart page.
Add new dataview webpart

http://blog.sharepointexperience.com/2013/05/mega-menu-for-sharepoint-part-3-of-3/

Add xsl reference.
Add content editor webpart. Add Css.
You can see your mega menu.