How delete some links and save others in Epub

Hi,

I convert daisy audiobook with text toe pub using calibre 4.22.

All text are links (to audiofiles) and i found a way to get rid of all of them so there are only text left i the epub.

But some links in the text i would like to keep, like reference within the book.

How can i get rid of the audio-text link and save the others?

Thanks in advance and I apologize if I hav e missed some rules here

Anders