brand multi-select logic.Review by:@xuqi

@@ -105,7 +105,7 @@ $brandMulti.click(function() {
     if ($brandPanel.css('display') === 'none') {
 
         //显示品牌面板
-        brandShowMore();
+        $brandMore.trigger('click');
     }
 
     $brandPanel.addClass('multi'); //显示出checkbox
@@ -178,9 +178,9 @@ $('.multi-select-cancel').click(function() {
     var $panel = $(this).closest('.multi');
 
     if ($panel.hasClass('brand-panel')) {
-        brandHideMore();
 
         $brandMulti.removeClass('hide'); //显示多选按钮
+        $brandMore.trigger('click');
     }
 
     $panel.removeClass('multi');