Is there a tool available which would convert the sources given into HTML with links?
By links I mean that every type, class, and method used would point via href to its definition.
I haven't managed to make highlight, syntax-highlight, nor pygments work this way. Even if it supports input from ctags, it only adds the title attribute, but not links.
Highlight can easily be modified to support things such as adding links to function / class definitions, as well as manual entries.
I was able to hook on to the class and function detection, and have each instance linked to the PHP Manual in my testing. I don't know what you'd want yours to link to, so it's your choice (per language, of course.)