During gameplay Pause the
game and HOLD L3 and press Triangle, Circle, Circle, Circle, Circle

Unlock All Seasons in Sim
Mode

Go to any menu screen and press
L2, R2, Square, Circle, R1, R1, L1, Circle, Circle.

Skip Level in Season Mode

During gameplay Pause the
game and HOLD L3 and press 
Square, Circle, R1, L1, L2, Square, Square, Square.