Updated 课程分类信息查询 (markdown)

@@ -37,6 +37,42 @@ id 和 path 直传一个，两个都传，默认以id为准
     }
   ]
 }
+--------------------
+返回二级、三级或四级目录：
+{
+  "catalogList": [
+    {
+      "id": 1931,
+      "pathFlag": 100102105,
+      "name": "九年级",
+      "summary": null
+    },
+    {
+      "id": 1941,
+      "pathFlag": 100102106,
+      "name": "四上",
+      "summary": null
+    },
+    {
+      "id": 1948,
+      "pathFlag": 100102107,
+      "name": "四下",
+      "summary": null
+    },
+    {
+      "id": 2015,
+      "pathFlag": 100102115,
+      "name": "八下",
+      "summary": null
+    },
+    {
+      "id": 2045,
+      "pathFlag": 100102118,
+      "name": "八上",
+      "summary": null
+    }
+  ]
+}
 ```
 
 path是为提供树形结构提供的数据信息，三位数字为一个单位，每个单位固定以100开头，举例来讲：