Does this mean i have to start over?

i made a cute little nav bar and am adding drop-downs to it. but i made each button on a separate layer so my labels and everything dont really correspond…therefore meaning my drop-downs dont work. i need to get all 4 of my buttons onto the same layer…is there anyway to do this without completely starting over?
also i dont know how to upload my file to put on here so people can actually see want in the world i’m attempting to do

doesn’t it work when ya cut and paste it keeps the code when i do