a SED need

[Jack Stone]

I have some HTML files with hundreds of URLs that I need to modify using a 
search/replace string. I assume that SED(1) is the right tool to use, but 
every syntax I've tried has not worked.

Here is what I'm trying to do:
Change full URLs to relative paths, in other words, chop off the
"http://www.example.com/" portion:

>From this:
<li><a href="http://www.example.com/model/many.html">
To this:
<li><a href="model/many.html">

I think it is the slashes and quotes that are giving me fits as I'm very 
much a novice on SED(1) syntax.

Would appreciate any tips on how to do the above so I can search and replace 
all of the hundreds of URLs.

Many thanks and Happy New Year!

Regards,
Jack

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