How to make labels of fields selectable? Does anybody know if there is a module to make labels of fields selectable,
for instance 
Field course:


Abc in DCT
123 today
listening pop


so if I select 123 today, in my content display I would have:

course: 123 today

but I would like to change course: by workshop: at the visualization of the content and have "course" for the other two (Abc in DCT and listening pop). So maybe there is a module that allows label selection, I haven't find it yet.
You'll have to make a custom field formatter with a settings form where you select the label and then output it accordingly. 

Like in this tutorial about field formatters