do plusstar list and detail page

@@ -36,7 +36,7 @@ class Helpers
         
         // 市场价和售价一样，则不显示市场价
         if (intval($productData['market_price']) === intval($productData['sales_price'])) {
-            $productData['market_price'] = '';
+            $productData['market_price'] = false;
         }
 
         $result = array();