Honestly, you can't. But, there are a few tips that can help personalize your space, and keep you cooking happily for the duration of your lease.
PAINT. Painting can change any space for the better. Whether you go with something bold or a chalkboard backsplash, paint is a fairly inexpensive, and temporary way to add color and style to a bland kitchen. Rustoleum has a tintable chalkboard paint that comes in twelve different colors that can make it fun to leave messages for one another, or inspirational quotes when you just need a little encouragement. Most (not all) apartment complexes, and landlords will allow you to paint if you paint it back to the original color before you move out.