In a mixing, combine the first five ingredients; mix well. Let stand for 10 minutes. Combine flour, sugars, baking powder and salt; add to the bran mixture. Stir well (the batter will be lumpy). Fold in apple and nuts. Spoon into 12 greased or paper-lined muffin cups (cups will be full). Sprinkle with cinnamon. Bake at 375° for 25 minutes or until muffins test done.