function __WrappingTags($html)
{
      function isExternalLink($link)
      {
        $link = parse_url($link);
        if(isset($link["host"]))
          if($link["host"]=="3data.ru")
             return false;
          else
             return true;
        else
          return false;
      }


  //$html = "Текст <a href='http://yandex.ru/page1.html'>ссылка</a> bbb Текст <a href='http://3data.ru/page1.html'>текст</a> и снова <a href=\"page2.html\" title=''>еще ссылка</a> конец";

      $nofollow = ' target="_blank" rel="nofollow';
      $prefix = "<!--noindex-->";
      $postfix ='<!--/noindex-->';

      preg_match_all("/<[Aa][\s]{1}[^>]*[Hh][Rr][Ee][Ff][^=]*=[ '\"\s]*([^ \"'>\s#]+)[^>]*>/", $html, $matches);
      $changed = $matches[1];
      $toreplace = $matches[1];

      for($i=0; $i<count($changed); $i++)
        if(isExternalLink($changed[$i]))
          $changed[$i] =  $changed[$i] . '"' . $nofollow;
        else
          $changed[$i] = $matches[1][$i];
      $html = str_replace($toreplace, $changed, $html);

      preg_match_all("/<[Aa][\s]{1}[^>]*[Hh][Rr][Ee][Ff][^=]*=[ '\"\s]*([^ \"'>\s#]+)[^>]*>/", $html, $matches);
      $change = $matches[0];
      $rep = $matches[0];

      for($i=0; $i<count($change); $i++)
        if(isExternalLink($matches[1][$i]))
          $change[$i] =  $prefix . $rep[$i] ;
        else
          $change[$i] = $matches[0][$i];
      $html = str_replace($rep, $change, $html);

      preg_match_all("/<a.+?href[^=]*=[ '\"\s]*([^ \"'>\s#]+)[^>]*>.*?<\/a>/", $html, $new);
      $secondpart = $new[0];
      $replace = $new[0];

      for($i=0; $i<count($secondpart); $i++)
        if(isExternalLink($matches[1][$i]))
           $secondpart[$i] =  $secondpart[$i] . $postfix;
      $html = str_replace($replace, $secondpart, $html);

      return $html;
}