Ordered lists and their indexes

I've got an ordered list that I'm looking to hide some of the list options but have their respective indexes (the number) stay the same.

.hide() hides it just fine.... but then changes the numbers (goes from 1-7, say, to 1-6 rather than 1,2,4,5,6,7)

I can get the desired effect by using css with `visibility: hidden`. but that leaves the space behind.