//判断是否微信浏览器 -xzz1125
function is_weixin() { 
    if (strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false) { 
        return true; 
    } return false; 
}

<script type="text/javascript">
window.onload = function(){
    if(isWeiXin()){
        //document.getElementById('baoming').href="http://www.xxiangfang.com/index.php?do=xian&view=index&join=phone";    //试睡师
        document.getElementById('baoming').href="http://www.xxiangfang.com/index.php?do=zhaoguan&view=SelectCate";        //乡贤报名
    }
    else{
        //document.getElementById('baoming').href="http://www.xxiangfang.com/index.php?do=xian&view=index";          //试睡师
        document.getElementById('baoming').href="http://www.xxiangfang.com/index.php?do=zhaoguan&view=SelectCate";//乡贤报名
    }
}
function isWeiXin(){
    var ua = window.navigator.userAgent.toLowerCase();
    if(ua.match(/MicroMessenger/i) == 'micromessenger'){
        return true;
    }else{
        return false;
    }
}
</script>