Custom ids gets converted to something another

[tolgaerdonmez]

I'm trying to add custom hyperlinks by ids, but my hyperlinks to ids don't work. I converted the epub file to html and I see that all ids are converted incrementally to calibre_link0, calibre_link1 how do I prevent this and keep my own ids?

I want to do this because, I want to create a table of contents page and set links to specific parts of the book.