All I can suggest is to do lots of leg and pelvis streches so you can get your body to even better shape for dance. Also remember that in dance when doing a split it usually is done is 1-3 seconds so a dancer doesn't really have time to go all the way down to the floor and back up. But I can understand you wanted to get back to where you left off a year ago. So ask you teacher for some streach moves and have fun!