Can all types of honey be used to make mead?
To address your 'headline' question: Yes, any kind of honey can be used to make mead, however the mead may have a significantly different flavor depending on the honey chosen. Orange Blossom honey will create a sweeter mead that is lighter in color (like a lager beer) where buckwheat honey will produce a mead that has more earthy tones (like an amber). 

Raw honey is 'straight out of the hive' without any processing and sometimes without even any filtering. "Regular" honey has been pasteurized and always filtered. "Wild" honey doesn't have an "official" meaning, but is probably the same as "raw". It is likely just a marketing/branding label.

note: I did find one reference to 'wild honey' being from bees 'in the wild', I find this unlikely as collecting honey from 'wild' beehives is not very efficient, is destructive to the hive and not at all good for the bees.