Bootstrap 3 Megamenu Script
Bootstrap 3 Megamenu
Open the Pages dropdown to see the Telha megamenu demo.
Copy the style tags into your style.css.
Copy the Telha megamenu dropdown into your existing Bootstrap navbar and add rows and columns, and use elements such as div, span, and p to place everything. Add images, forms, and so forth.
Adjust CSS and layout as is needed. Have fun!