<select id="pz" name="pz" lay-filter="pz" type="select">
<option  data-href="'.$url.'&pz=10"   value="10">10</option>
<option  data-href="'.$url.'&pz=20"   value="20">20</option>
</select>


<script>
layui.use('form', function(){
     var $ = layui.jquery, form = layui.form; 

     //分頁監聽開始——————————————————————————————————
     form.on('select(pz)', function(data){

         //獲取自定義屬性值
	  var datahref=$(data.elem).find("option:selected").attr("data-href");
          location.href =datahref;       
     });  
    //預設賦值	 
     $("#pz").val("{$pz}");     
     form.render('select'); 	  
  //分頁監聽結束———————————————————————————————————
  
});