The latest update for Nodes As Tabs supports tab selection for link-forums. So you can consolidate multiple unrelated pages under one node tab with link-forums. First enable tab selection for link-forums, then create a node structure like this:
Parent Node (is Tab)
- child link-forum (links to blogs)
- child link-forum (links to groups)
- child link-forum (links to albums)
- child link-forum (links to xentrader)
Or if you want to assign a non-node page to a non-node tab then you can just create a link-forum on its own that is manually assigned to a tabid. This is also described in the latest update.
This works well in most situations. Note that tab selection for link-forums uses relative URI matching. So if you link to members/ then it will pull in (for tab selection) all pages beginning with that route. This is an advanced application of Nodes As Tabs, but it should work for you.
After consolidating your tabs using link-forums you will probably want to hide the old tabs. You can do this using CSS.
Admin CP -> Appearance -> Templates -> EXTRA.css
You must specify the tabid which can be seen in the HTML source.