Lol, while I was writing a wrong answer for your reply I came up with a simple idea that might work well for you, there is a plugin for HTML called table sorter I used quite a few times.
Table sorter:
http://tablesorter.com/docs/
It's not the most elegant solution I bet but it should work like a charm, you basically create a table of two columns, 1 would be the name of the link and one the url (href), then hit the sort button and copy paste the output source.
If nobody has a better idea and you like doing this more than one time I will take the challenge to write something more convenient to use this on a more regular basis.
EDIT: There is also list sorter:
http://listjs.com/ which would be more compatible with what you're trying to accomplish since TOCs are basically lists.
EDIT2: If you still want to use excel you can do pretty much what I offered but manually, copy paste your TOC (FROM VIEW MODE - NO CODE) to Excel, sort and then match the right links, TOCs are not THAT long so it shouldn't take more than a couple of minutes anyway. Then again, if you do this often a better solution would be nice to find
