I think you are thinking of the phrase  the other way around , which does essentially mean the opposite, but in a specific way. The specific nature of the other way around is that it means that doing what you say in the opposite direction is correct, not necessarily the exact opposite.
You can offer your kitten either dry food, canned food, or both. Be sure to choose food which is designed for kittens. They require a diet which is especially rich in protein, calcium, and other nutrients. Cat food that is for adults is not sufficient.
When the orphaned kittens are three to four weeks old, begin to offer milk replacer in a shallow bowl, then introduce a moist, easily chewable diet. You can make gruel from warmed milk replacer and a high-quality dry or canned kitten food. Serve it in a shallow bowl and feed the kittens several times each day. By five weeks old, they should be getting used to their new diet.