I'm building a website that has a member's area. One of the two drop-down menus in the header navigation contains a public area's subpages. The other one has the Member's Area subpages*, and I'd prefer to either disable that one from dropping down unless the user is logged in, or make the relevant subpages so they don't appear in header navigation at all.
Does anyone have any idea how to accomplish this? I probably won't be the person maintaining the site, so the result probably shouldn't involve any direct modifications to the Graphene code unless done in a child theme.
*(One thing I should probably mention is that the Member's Area page and subpages are barrier'd off from users who aren't logged in with Andy Stratton and Matt Martz's Page Restrict plugin, so people will have to log in if they access the subpages anyway.)