preg_replace正则表达式

$content = preg_replace('/<tr[^>]*>[\s]*<td[^>]*>[\s]*日比较[\s]*<\/td>[\s\S]*?<\/tr>/ ','',$content);
+               $content = preg_replace('/<tr[^>]*>[\s]*<td[^>]*>[\s]*周比较[\s]*<\/td>[\s\S]*?<\/tr>/ ','',$content);

	function filter($output){
		$pattern = "/<a\shref='(.*?&atkaction=report.*?)'\s>(.*?)<\/a>/";
		$m = array();
		preg_match_all($pattern, $output, $m);
		$pattern2 = array();
        foreach($m[1] as $key => $val){
            $pattern2[] = "/<a\shref=\'".preg_quote($val,"/")."\'\s>(.*?)<\/a>/";
        }
		$output2 = preg_replace($pattern2,$m[2],$output);
		return $output2;
	}