All I did was change TweenLite.to to TweenMax.to but sure u can see some code
for(i = 0; i < menuGroup.numChildren; i++){
mcMenu = MovieClip(menuGroup.getChildAt(i));
mcMenu.x = 470;
mcMenu.y = 470;
mcMenu.scaleX = mcMenu.scaleY = 0.3;
TweenLite.to(mcMenu,0.65,{
x: 280 + (i % 3) * 130,
y: 280 + Math.floor(i / 3) * 130,
scaleX: 1, scaleY: 1,
alpha: 1,
delay: 0.055 * i, ease: Back.easeOut
} );
}