Url of non-hyperlink in regular matching

Now I can get all the links for url matching non-hyperlink, but the question is: how do I write a regular expression if I want to filter out the URLs in the hyperlink and img ?, Echopreg_replace ('/http :\/\/. +/I ',' & lt; ahref = & quot; \ 0 & quot; & gt; \ 0 & regular match url with non-Hyperlink
Now I can get all the links, but the question is: how do I write regular expressions if I want to filter out the URLs in the hyperlink and img?

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Echo preg_replace ('/http: \/. +/I', '\ 0', strip_tags ($ s ));

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Just deny the asserted href.
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First no href = ", then no ".

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