How to make a drop-down main menu with infoblock sections?

Question

1C-Bitrix

Good afternoon.
Tell me, who knows how you can make the main menu of the site so that the main menu items are sections of the info block, and at the same time, when you hover over them, a list of subsections of this section or section elements drops out?
With the standard template, it is only possible to display sections and subsections of one infoblock in the drop-down list.

Answer 1

Use the native way
the main.menu_ext.php file, if I'm not mistaken, it is in the standard installation of the Internet store,
if not, then, for example, here

Answer 2

1. Make layout
2. Use API
3. Set up caching