Details are scarce, but the couple apparently had a prenuptial agreement. Prenuptial agreements allow couples to make agreements prior to their marriage regarding any number of things, though they are often used to protect one of the parties who may have substantially more assets than the other and does not want those assets to be divided in the event of a divorce.
Her attorneys likely advised Ms. Kardashian on her best options, but in states like Florida, a marriage for such a short period of time could be drawn to a close through an annulment. Annulments are available primarily when the marriage was never valid in the first place; however, such instances can be difficult to prove.
If you are considering a divorce or would like to learn more about annulments, you should contact a Florida Family Law Attorney to discuss the best options available.