修复lifestyle有货币页面，code review by LZF

@@ -50,31 +50,33 @@ module.exports = function(specificGender) {
     $curNav = $navList.children('.focus');
 
     if (lifestyleType) {
-        navHammer = new Hammer($navList[0]);
-        navHammer.on('tap', function(e) {
-            var $this = $(e.target).closest('li'),
-                $goods = $('.goods-list'),
-                $content;
-
-            e.preventDefault();
-            if ($this.hasClass('focus')) {
-                return;
-            }
+        navHammer = $navList[0] ? new Hammer($navList[0]) : undefined;
+        if (navHammer) {
+            navHammer.on('tap', function(e) {
+                var $this = $(e.target).closest('li'),
+                    $goods = $('.goods-list'),
+                    $content;
+
+                e.preventDefault();
+                if ($this.hasClass('focus')) {
+                    return;
+                }
 
-            index = $this.index();
+                index = $this.index();
 
-            $this.addClass('focus');
-            $curNav.removeClass('focus');
+                $this.addClass('focus');
+                $curNav.removeClass('focus');
 
-            $goods.not('.hide').addClass('hide');
-            $content = $goods.eq(index);
-            $content.removeClass('hide');
+                $goods.not('.hide').addClass('hide');
+                $content = $goods.eq(index);
+                $content.removeClass('hide');
 
-            $curNav = $this;
+                $curNav = $this;
 
-            $(document).trigger('scroll'); //Trigger lazyLoad
-            e.srcEvent.stopPropagation();
-        });
+                $(document).trigger('scroll'); //Trigger lazyLoad
+                e.srcEvent.stopPropagation();
+            });
+        }
     }
 
     loading.init($('.maybe-like'));