~
Thank you. I think I got it.
I went to
https://bitcointalk.org/sitemap.php?t=b, grabbed every board url, scraped each one of them and linked them to their parent. There are only 248 boards, so it was pretty quick.
"board_id","name","parent_id"
1, Bitcoin Discussion,
4, Bitcoin Technical Support,
14, Mining,
40, Mining support, 14
42, Mining software (miners), 14
If you want it:
https://pastebin.com/raw/xhudKFZ8