Go into photos select photo, tap icon bottom left , select Facebook. A list will come up top one should be albums. Tap on it, should bring up your Facebook albums.
Facebook update : Nov 2013, Facebook has been disable PICTURE UPLOAD TO GROUP. not just on ios7. that function has been disable for all third party application (using graph api).
I am having the same problem.. I updated my I os7 and now I can not up load photos from facebook. It keeps telling me to add my password but tell me it can not connect to server or server error when I do this. Its the only app I am having problems with. I have checked all my settings and even rest my phone. Nothing that I have found works. Anyone have any ideas???