www.wysiwygwebbuilder.com

I need to create the same menu as here on the left

https://www.montako.cz/

I don't know what menu to use in the program. The slide menu is similar to this but you cannot open other items. Can you please advise me how to create this menu in the program?

Maybe this is useful?
http://www.wysiwygwebbuilder.com/expandablemenu.html
http://www.wysiwygwebbuilder.com/drilldownmenu.html

Or else:
http://wysiwygwebbuilder.com/navigation.html