I have a Tab - say "Issue Tracker". On clicking this, a vf page is opened from which 3 options(links) can be selected. On selecting any of the links, user is directed to the standard new page layout like 'New Issue Tracker'. I need to override this name - Issue Tracker on the detail page based on the link that was selected. e.g if the user selected 'Defects' as the first link, the new page layout should be "New Defect" 7 so on.
I'm not much expert but could try on this : Per my understanding , I don't think this is possible by any standard means
If you just want to change headings( defect, backlog etc) on Page , Then I think, you can write VF page with standard controller and and pass parameters from the links to decide what should be 'Title' of the pageblock section
If you want to change label of tab itself b, then little extra work is required.
You have to create objects with the names like 'Defect' , 'Backlog' etc. just dummy objects with ono other details. they will be used to control label of Tab
After object creation - create 3 different VF with standard controller( baed on issue Tracker object) based on parameters passed from links on middle level VF page.
each VF page will have different 'tabstyle' attribute matching names(Defect, backlog etc) what you want. But inside ,all 3 VF page will still be implementing same standard controller based on Issue tracker object.
Hope this helps!