php preg_replace正则表达式除去<a>
$content = '<br><a target="_blank" href="/redirect/http%3A//www.ctdisk.com/u/1227383">http://www.ctdisk.com/u/1227383</a>
</td>';
$content = preg_replace('/<a\s+.*?>(.*?)<\/a>/i', '${1}', $content);
去除所有链接