public static function contentReplaceTag($content)
{
$content = preg_replace_callback('/#(\\S+?)#/', function ($matches) {
$tagName = $matches[1];
return sprintf('[%s](%s)', "#{$tagName}#", Url::to(['/tweet/default/index', 'topic' => $tagName]));
}, $content);
return $content;
}