$re = '/([\w\s-\(\)]+)<//';
$str = '<a class="producto" href="ver.asp?id=4013">A86028</a></span><!-- /a --></td></tr>
<a class="producto" href="ver.asp?id=4014">1027C</a></span><!-- /a --></td></tr>
<a class="producto" href="ver.asp?id=4014">5611 4020</a></span>
<!-- /a --></td></tr>
<a class="producto" href="ver.asp?id=4014">396-4185</a></span>
<!-- /a --></td></tr>
<a class="producto" href="ver.asp?id=4014">834006-5-7</a></span>
<!-- /a --></td></tr>
<a class="producto" href="ver.asp?id=4014">5601GR 4325GR</a></span>
<!-- /a --></td></tr>
<a class="producto" href="ver.asp?id=4014">2182CR(2)</a></span>
<!-- /a --></td></tr>
<a class="producto" href="ver.asp?id=4014">1458-54-63-55</a></span>
<!-- /a --></td></tr>
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php