Figure out how you'd do it manually, then have the computer do the same thing.

I think I'd probably read the HTML table into Excel, then dump the result into a CSV. From there, I would get a Perl script to read the CSV and write out a new table. Presumably you want the first seven elements (1,1 to 1,5, 2,1 and 2,2) to go into the first row of the new table, and son on.

But there are many ways to solve this problem. :) Let us know how it turns out!