Yes, cats can have dandruff. I've heard it can be because they aren't getting enough oils in their diet. I think some people add fish oil to their cat's food to help this. You might try using the search feature to get more info. Also, I'd talk with a vet before making any changes.
dandruff can come from different things. a health issue which usually can only be seen with blood tests. an allergy to a food or mites which can only be determined with a hypoallergenic food elemination or allergy work up (expensive and last resort after food elemination) or stress or lack of self bathing.