diff --git a/back/inventory/views.py b/back/inventory/views.py
index 543f7e7..f6fff40 100644
--- a/back/inventory/views.py
+++ b/back/inventory/views.py
@@ -44,6 +44,21 @@ class PartnerViewSet(viewsets.ModelViewSet):
             return Response(status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 
 
+def get_depth_cat(id):
+    params = {
+        "$format": "json",
+        "$select": ",".join(["Description", "Ref_Key", "Parent_Key"]),
+        "$filter": f"Parent_Key eq guid'{id}'",
+    }
+    remote_url = (
+        "https://1c.svs-tech.pro/UNF/odata/standard.odata/Catalog_КатегорииНоменклатуры?"
+        + "&".join([f"{p}={params[p]}" for p in params])
+    )
+    data = requests.get(remote_url, headers={"Authorization": settings.ODATA_AUTH})
+    parsed_data = data.json()
+    return parsed_data["value"]
+
+
 class ElementViewSet(viewsets.ModelViewSet):
     """
     API endpoint that allows elements to be viewed or edited.
@@ -55,32 +70,22 @@ class ElementViewSet(viewsets.ModelViewSet):
     @action(detail=False, methods=["get"], url_path=r"external_categories")
     def get_remote_categories(self, request):
         try:
-            params = {
-                "$format": "json",
-                "$select": ",".join(["Description", "Ref_Key", "Parent_Key"]),
-                "$filter": "Parent_Key eq guid'a6aadfe8-7e0f-11ee-ab5a-a47a2bd811cb'",
-            }
-            remote_url = (
-                "https://1c.svs-tech.pro/UNF/odata/standard.odata/Catalog_КатегорииНоменклатуры?"
-                + "&".join([f"{p}={params[p]}" for p in params])
-            )
-            data = requests.get(
-                remote_url, headers={"Authorization": settings.ODATA_AUTH}
-            )
-            parsed_data = data.json()
-
-            params["$filter"] = " or ".join(
-                [f"Parent_Key eq guid'{v['Ref_Key']}'" for v in parsed_data["value"]]
-            )
-            remote_url = (
-                "https://1c.svs-tech.pro/UNF/odata/standard.odata/Catalog_КатегорииНоменклатуры?"
-                + "&".join([f"{p}={params[p]}" for p in params])
-            )
-            data = requests.get(
-                remote_url, headers={"Authorization": settings.ODATA_AUTH}
-            )
-            parsed_data = data.json()
-            return Response(parsed_data["value"])
+            all_categories = []
+            categories = get_depth_cat("a6aadfe8-7e0f-11ee-ab5a-a47a2bd811cb")
+            for category in categories:
+                depth = get_depth_cat(category["Ref_Key"])
+                if len(depth):
+                    for cat2 in depth:
+                        depth2 = get_depth_cat(cat2["Ref_Key"])
+                        if len(depth2):
+                            for cat3 in depth2:
+                                depth3 = get_depth_cat(cat3["Ref_Key"])
+                                all_categories.append(depth3)
+                        else:
+                            all_categories.append(depth2)
+                else:
+                    all_categories.append(depth)
+            return Response(categories)
         except Exception as e:
             logger.error(e)
             return Response(status=status.HTTP_500_INTERNAL_SERVER_ERROR)