BuddyPress.org

How to add tabs and sub-tabs: https://gist.github.com/shanebp/5d3d2f298727a0a036e5

Add the unique content by writing your code in the …_screen_content functions. For example, function animals_screen_content()

Change 'user_has_access' => bp_is_my_profile() to 'user_has_access' => true if you want everyone to see subtabs.