Description:
------------
Preg_replace wont replace properly

Reproduce code:
---------------
 $patterns = '{([\w_]+)(\s*</font>)'.  
3	                        '(\s*<font\s+color="'.$keycol.'">\s*\()}m';  
4	           $replacements = '<a class="code" title="View manual page for $1" href="'.$manual.'$1" target="_blank">$1</a>$2$3'; 
5	           return  preg_replace($patterns, $replacements, $code); 

example using php4+:
downlaod any file from http://www.codedb.org/files.php?lang=php
and it will underline the add <a href> to the php functions


Expected result:
----------------
<br /></font><font color="#007700">function&nbsp;</font><font color="#0000BB"><a class="code" href="http://www.php.net/manual-lookup.php?lang=en&amp;pattern=isemail" title="View manual page for isemail" target="_blank">isemail</a></font><font color="#007700">(</font><font color="#0000BB">$mail</font><font color="#007700">)

<br />{
<br />&nbsp;&nbsp;if&nbsp;(</font><font color="#0000BB"><a class="code" href="http://www.php.net/manual-lookup.php?lang=en&amp;pattern=eregi" title="View manual page for eregi" target="_blank">eregi</a></font><font color="#007700">(</font><font color="#DD0000">"^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$"</font><font color="#007700">,</font><font color="#0000BB">$mail</font><font color="#007700">))
<br />&nbsp;&nbsp;{
<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</font><font color="#0000BB">1</font><font color="#007700">;
<br />&nbsp;&nbsp;}
<br />&nbsp;&nbsp;else&nbsp;{
<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</font><font color="#0000BB">0</font><font color="#007700">;

<br />&nbsp;&nbsp;}
<br />}
<br /></font><font color="#0000BB">?&gt;</font>

Actual result:
--------------
<br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">isemail</span><span style="color: #007700">(</span><span style="color: #0000BB">$mail</span><span style="color: #007700">)

<br />{
<br />&nbsp;&nbsp;if&nbsp;(</span><span style="color: #0000BB">eregi</span><span style="color: #007700">(</span><span style="color: #DD0000">"^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$"</span><span style="color: #007700">,</span><span style="color: #0000BB">$mail</span><span style="color: #007700">))
<br />&nbsp;&nbsp;{
<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">;
<br />&nbsp;&nbsp;}
<br />&nbsp;&nbsp;else&nbsp;{
<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">;

<br />&nbsp;&nbsp;}
<br />}
<br /></span><span style="color: #0000BB">?&gt;</span>