Hi,
Do you mean any particular one or just generally - e.g. as collected
here?
Anyway, this would need either a custom web part (based on repeaters) or
modification of an existing one.
Most probably you will need to modify the html output of those web parts. It's stored in
RenderedHTML property, that can be modified on Render/PreRender.
Closer instructions are not yet present in any document.
Regards,
Zdenek C.