ob_start();

 $html = curl_init('http://www.beijing.gov.cn/');

 curl_exec($html);

 $html = iconv('GBK','UTF-8',$html);

 $config = array('indent' => TRUE,

     'output-xhtml' => TRUE,

     'wrap' => 200);

 $tidy = tidy_parse_string($html,$config,'UTF8');

 $tidy->cleanRepair();

 $tidyhtml = (string)$tidy;

 $xml = simplexml_load_string($tidyhtml);

 echo $tidyhtml;

 var_dump($xml);