Problem:
Although it is visually clear that “Members” and “Privileges,” are section tabs, the screenreader user simply hears these as links.
Solution:
Use aria-role=”tab” for each of the tabs (circled) and use JavaScript or jQuery to change the attribute aria-selected=”true” as each tab is selected and change not-activated tabs to aria-selected=”false”. This will inform the screenreader user that these are tabs and when each tab is selected or non-selected.
See http://accessibility.athena-ict.com/aria/examples/tabpanel2.shtml for more information and an example of how this would be implemented.