Florida Criminal Rule 3.800 (c) provides that a court may modify or reduce a sentence after it has been imposed. This would be the 57th day. An attorney can file a motion requesting a reduction but he would need some evidence as to why it should be reduced, preferrably evidence that was not available at the time of the original imposition of this sentence. You should act ASAP if you intend to do anything.
It sounds like there is little that can be done almost a year after the fact. However, you should consult with an appellate/post-conviction lawyer so that they can review your boyfriend's case.