array To Json.php

php 的json　数据里　有双引号　和回车符　传到都会错

<?php
$arr = array (  
  array (  
      'catid' => '4',  
      'catname' => '招聘信息',  
      'meta_title' => '招聘信息标题'  
    ),  
 
    array (  
      'catid' => '55',  
      'catname' => 'php教程',  
      'meta_title' => 'php教程标题',  
    )  
);  
//这是数组转换为json
$jsonstr = json_encode($arr);  
echo $jsonstr;
//结果
//[{"catid":"4","catname":"\u62db\u8058\u4fe1\u606f","meta_title":"\u62db\u8058\u4fe1\u606f\u6807\u9898"},
//{"catid":"55","catname":"php\u6559\u7a0b","meta_title":"php\u6559\u7a0b\u6807\u9898"}]






<?php
//在 php端
foreach ($_jj_company as $key=>$value) {
            $_jj_company[$key]['companyName'] =  urlencode(iconv('GB2312','UTF-8',$value['companyName']));
        }
        $jsonData = json_encode($_jj_company);

        $this->tpl->set('jsonData', $jsonData);
?>


//在html端
var jsonData=<?=$jsonData?>;

取数据应该是  decodeURIComponent(row.companyName);  就取到公司名了