[Zope] plone, open folder in menu by default

hello, I have different usergroups in my plone site, for example: if a user with group "partners" logs in, he gets a menu, with the standard items, and then the folder "Partners Area", this is a folder with all the items specific for users in this group, not visible for other users. but in plone menu, by default, this folder is closed, is it possible to have it open by default? thanks, Olivier