In bowl, combine bran, flour, sugar, cinnamon, baking powder, baking soda, salt and raisins; toss to mix. Add pumpkin, eggs, oil and yogurt; stir just combined.
Spoon batter into paper-lined or nonstick muffin tins. Bake in 400 degree F oven for 25 minutes or until firm to the touch. Makes 12 muffins.