change url to a link

[Anon]

I need help with a pattern string to replace all url/email to be linkable html tags. Such as:
<p>www.hotmail.com -&gt; &lt;a href=&quot;www.hotmail.com&quot;&gt;www.hotmail.com&lt;/a&gt;<br>
or<br>
http://www.hotmail.com -&gt; &lt;a href=&quot;www.hotmail.com&quot;&gt;http://www.hotmail.com&lt;/a&gt;<br>
or<br>
[e-mail] -&gt; &lt;a href=&quot;mailto:[e-mail]&quot;&gt;[e-mail]&lt;/a&gt;<br>
&nbsp;</p>
etc...
Please help. Thanks.