php 正则匹配table所有标签

在做网站后台编辑功能及列表显示时发现如果前台的数据有转码过的table标签，网页的布局（列表布局使用table）就会乱掉,显示列表需把table标签转化掉

<?php
                    $content=IString::str_cut(strip_tags($item['comp_intro']),640,true);
$str='<a href="/system/goods/company_reviewEdit/id/'.$item[uid].'" $strr = html_entity_decode(preg_replace('/\>\>\>更多详情/',$str,$content));
echo preg_replace(array('/<(table|tbody|tr|th|td)[^>]*>/is','/<\/(table|tbody|tr|th|td)>/is'),array('<div>','</div>'),$strr);
?>

网页字符串处理

/**
     * 字符截取 支持UTF8/GBK
     * @param $string
     * @param $length
     * @param $dot
     */
    public static function str_cut($string, $length, $isUTF8=true, $dot = '>>>更多详情') {
        $strlen = strlen($string);
        if($strlen <= $length) return $string;
        $string = str_replace(array(' ','&nbsp;', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), array('∵',' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string);
        $strcut = '';
        //if(strtolower(CHARSET) == 'utf-8') {
        if($isUTF8 == true) {
            $length = intval($length-strlen($dot)-$length/3);
            $n = $tn = $noc = 0;
            while($n < strlen($string)) {
                $t = ord($string[$n]);
                if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
                    $tn = 1; $n++; $noc++;
                } elseif(194 <= $t && $t <= 223) {
                    $tn = 2; $n += 2; $noc += 2;
                } elseif(224 <= $t && $t <= 239) {
                    $tn = 3; $n += 3; $noc += 2;
                } elseif(240 <= $t && $t <= 247) {
                    $tn = 4; $n += 4; $noc += 2;
                } elseif(248 <= $t && $t <= 251) {
                    $tn = 5; $n += 5; $noc += 2;
                } elseif($t == 252 || $t == 253) {
                    $tn = 6; $n += 6; $noc += 2;
                } else {
                    $n++;
                }
                if($noc >= $length) {
                    break;
                }
            }
            if($noc > $length) {
                $n -= $tn;
            }
            $strcut = substr($string, 0, $n);
            $strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array(' ', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), $strcut);
        } else {
            $dotlen = strlen($dot);
            $maxi = $length - $dotlen - 1;
            $current_str = '';
            $search_arr = array('&',' ', '"', "'", '“', '”', '—', '<', '>', '·', '…','∵');
            $replace_arr = array('&amp;','&nbsp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;',' ');
            $search_flip = array_flip($search_arr);
            for ($i = 0; $i < $maxi; $i++) {
                $current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
                if (in_array($current_str, $search_arr)) {
                    $key = $search_flip[$current_str];
                    $current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str);
                }
                $strcut .= $current_str;
            }
        }
        return $strcut.$dot;
    }