The built-in Mega Menus can replace the standard drop-down navigation without the use of a plugin or custom coding. A mega menu can be activated on any parent menu item in the Main Navigation.
To turn on a Mega Menu, navigate to Appearance > Customize > Header > Mega Menu and you will see a list of all the menu items assigned to your Main Navigation slot:
You can now click on any of them to enable Mega Menu. This will replace the standard WordPress navigation such as children items, those will no longer show.
There are four types of Mega Menus you can create. Each Mega Menu type comes with its own set of options for further customization:
Repeat this process for each menu item that you want to apply a Mega Menu item to.