This is a subpage
There are three identical pages that are nested inside their parent menu item:
submenu_items = [...]
Menu.add_item("user", MenuItem("Subpages",
reverse('accounts:subpage', kwargs={'i': 1}),
icon="menu-app",
children=submenu_items))
Note that the second navigation bar is only shown for the pages that have a submenu. You can check it in the template:
{% if has_submenu
<!-- display submenu -->
{% endif %}
By default, the parent will not be marked active if their child active. The example site changes this behavior using a setting:
MENU_SELECT_PARENTS = True