Tab feature for the committee members(annual-wise)

Hi,I m using this theme for our past pupil's association, and we have to showcase all executive committee members(picture and position). I m wondering how can I sort this matter year-wise on this theme. I noticed there is a feature in your theme like a tab format for each element which is under "Program & Services" - Social, Professional and Intellectual, etc. If you can help to apply the same feature just for year-wise and to show kind of your gallery for each year with ex-committee members would be nice. Waiting to hear from you soon,Thanks in advance,Shiran F