Change default Group and Page links

Hello,

I would like to change default page when we click on Pages and Groups links on User Dropdown App Menu.

And for example that the url : http://easysocial.stackideas.com/pages/584-sophia/pages
Point to : http://easysocial.stackideas.com/pages/584-sophia/pages/participated

Instead of http://easysocial.stackideas.com/pages/584-sophia/pages/created

Same thing for Groups.

Please, can you enlighten me and tell me what file I have to change ?

Thank you,
Philippe