Hide a Dynamic MENU

[rider]

Hello,
I want built this here:
If I click on the menu (the top of a submenu), => the submenu will hide.
If I click a second time on the top of a submenu => the submenu will show.

How can I create this?

Another question is:
whats the different between the static and the dynamic menu?

[cagatay.civici]

you can use widgetVar.hide() or widgetVar.show();

Regarding difference between static and dynamic menu, menu section at user's guide explains that.

[rider]

Sorry, I don´t understand it:

<p:menu model="#{menuBean.model}" />

Which is the attribute that I should use?
Can you show me the code please.