Ok, I found "a solution" myself...
No idea if it is how it "should" be, but it works on my kindle.
This is ONLY useful if you are working with mobi-binary files directly! (So this is just for "coders")
This does not help you with any kind of generator-software.
I post my solution here, because I haven't found this at all at the internet.
I discovered this myself with the help of calibre, hexdump and a lot of try and error!
Here you go:
Code:
<html>
<head>
<guide>
<reference type="toc" title="Table of Contents" filepos="000114"/></guide>
</head>
<body>
<h1>Table of Content</h1>
<p><a filepos="000284">Foreword</a></p>
<p><a filepos="000521">Chapter One</a></p>
<p><a filepos="000758">Chapter Two</a></p>
<mbp:pagebreak />
<h1>START</h1>
<p>000 0000 some text 0000 000000000 000000000</p>
<p>000 000000000 000000000 000000000 000000000</p>
<p>000 000000000 000000000 000000000 000000000</p>
<p>000 000000000 000000000 000000000 000000000</p>
<mbp:pagebreak />
<h1>Chap1</h1>
<p>111 1111 some text 1111 111111111 111111111</p>
<p>111 111111111 111111111 111111111 111111111</p>
<p>111 111111111 111111111 111111111 111111111</p>
<p>111 111111111 111111111 111111111 111111111</p>
<mbp:pagebreak />
<h1>Chap2</h1>
<p>222 2222 some text 2222 222222222 222222222</p>
<p>222 222222222 222222222 222222222 222222222</p>
<p>222 222222222 222222222 222222222 222222222</p>
<p>222 222222222 222222222 222222222 222222222</p>
</body>
</html>
So inside of the mobi-format there are no more <a href="#bla" /> and stuff... its all made trough "filepos".. and the number is the number of the char in the html file where you want to jump to...
Hope this helps somebody...