Index: channels/bookmarks.py
==================================================================
--- channels/bookmarks.py
+++ channels/bookmarks.py
@@ -49,28 +49,32 @@
         "timer": [],
         "history": []
     }
     default = "favourite"
     fixed_size = [32,24]
+    reserved_names = ["favourite", "radiotray", "scripts", "search", "timer", "history", "links", "themes"] #+ self.parent.features.keys()
 
 
     # cache list, to determine if a PLS url is bookmarked
     urls = []
 
     def gui(self, parent):
         parent.notebook_channels.set_menu_label_text(parent.v_bookmarks, "bookmarks")
+        self.update_categories()
         GenericChannel.gui(self, parent)
         uikit.tree_column(self.gtk_cat, "Group")
 
-    # this channel does not actually retrieve/parse data from anywhere
+    # custom categories are shown as subfolder below `favourite`
     def update_categories(self):
-        pass
+        cust_cats = list(set(self.streams.keys()) - set(self.reserved_names))
+        if len(self.categories) < 2 or type(self.categories[1]) is not list:
+            self.categories.insert(1, [])
+        self.categories[1] = cust_cats
         
     # but category sub-plugins might provide a hook
     category_plugins = {}
     def update_streams(self, cat):
-
         if cat in self.category_plugins:
             return self.category_plugins[cat].update_streams(cat) or []
         else:
             return self.streams.get(cat, [])
 
@@ -104,11 +108,11 @@
         return str(url) in self.urls
 
 
     # called from main window / menu / context menu,
     # when bookmark is to be added for a selected stream entry
-    def add(self, row):
+    def add(self, row, target="favourite"):
 
         # Add / copy some row attributes
         row["favourite"] = 1
         if not row.get("favicon"):
             pass#   row["favicon"] = favicon.file(row.get("homepage"))
@@ -116,11 +120,11 @@
             row["listformat"] = self.parent.channel().listformat
         if not len(row.get("extra", "")):
             row["extra"] = self.parent.channel().module
 
         # append to storage
-        self.streams["favourite"].append(row)
+        self.streams[target].append(row)
         self.save()
         self.load(self.default)
         self.urls.append(row["url"])
 
 

ADDED   contrib/new_favourite_cat.py
Index: contrib/new_favourite_cat.py
==================================================================
--- contrib/new_favourite_cat.py
+++ contrib/new_favourite_cat.py
@@ -0,0 +1,80 @@
+# encoding: utf-8
+# api: streamtuner2
+# title: New favourite category
+# description: Introduces new bookmarks categories
+# version: 0.2
+# type: feature
+# category: ui
+# config: -
+# priority: optional
+# 
+# Adds a "New favourite category..." under Station > Extensions menu.
+# New categories will show up in the bookmarks channel under favourite.
+#
+
+from uikit import *
+from config import *
+
+# 
+class new_favourite_cat (object):
+    plugin = "new_favourite_cat"
+    meta = plugin_meta()
+    parent = None
+    w = None
+
+    # hook up menu entry
+    def __init__(self, parent):
+        self.parent = parent
+        uikit.add_menu([parent.extensions], "New favourite category…", self.win, insert=3)
+        self.create_submenu(parent)
+        self.update_submenu()
+  
+    # show input window
+    def win(self, *w):
+        w = self.w = gtk.Dialog(
+            'New bookmark category',
+            self.parent.win_streamtuner2, 
+            gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
+            (gtk.STOCK_OK, gtk.RESPONSE_APPLY)
+        )
+        input = gtk.Entry(35)
+        w.vbox.pack_start(input)
+        log.UI(w.vbox.get_children())
+        w.show_all()
+        self.add(self.w, w.run(), input.get_text())
+
+    # add category
+    def add(self, w, r, title):
+        bm = self.parent.bookmarks
+        have = bm.streams.has_key(title)
+        w.destroy()
+        if r == gtk.RESPONSE_APPLY:
+            log.NEW(title)
+            if not have:
+                bm.streams[title] = {}
+        if r == gtk.RESPONSE_DELETE_EVENT:
+            if have:
+                bm.streams.remove(title)
+        self.update_submenu()
+        bm.update_categories()
+        bm.display_categories()
+
+    # introduce MenuItem+Menu
+    def create_submenu(self, parent):
+        self.submenu = gtk.Menu()
+        for title, target, i in [("Bookmark to", parent.streammenu, 1), ("Add bookmark to", parent.streamactions, 3)]:
+            mi = gtk.ImageMenuItem(gtk.STOCK_INDENT)
+            mi.set_submenu(self.submenu)
+            mi.set_label(title)
+            mi.show_all()
+            target.insert(mi, i)
+
+    # bookmark to > … submenu w/ custom categories
+    def update_submenu(self):
+        bmc = self.parent.bookmarks.categories
+        [self.submenu.remove(w) for w in self.submenu.get_children()]
+        if len(bmc) >= 2 and type(bmc[1]) is list:
+            for label in bmc[1]:
+                uikit.add_menu([self.submenu], label, lambda w,target=label: self.parent.bookmark(w, target))
+        self.submenu.show_all()
+    

Index: gtk3.xml.gz
==================================================================
--- gtk3.xml.gz
+++ gtk3.xml.gz
cannot compute difference between binary files

Index: st2.py
==================================================================
--- st2.py
+++ st2.py
@@ -2,11 +2,11 @@
 # encoding: UTF-8
 # api: python
 # type: application
 # title: streamtuner2
 # description: Directory browser for internet radio, audio and video streams
-# version: 2.2.1-dev20180820
+# version: 2.2.1-dev20181218
 # state: stable
 # author: Mario Salzer <mario@include-once.org>
 # license: Public Domain
 # url: http://freshcode.club/projects/streamtuner2
 # config:  
@@ -321,12 +321,12 @@
         log.UI("on_category_clicked", category, self.current_channel)
         self.on_reload_clicked(None, reload=0)
         pass
 
     # Add current selection to bookmark store
-    def bookmark(self, widget):
-        self.bookmarks.add(self.row())
+    def bookmark(self, widget, target="favourite"):
+        self.bookmarks.add(self.row(), target)
         self.channel().row_icon(gtk.STOCK_ABOUT)
         # refresh bookmarks tab
         self.bookmarks.load(self.bookmarks.default)
 
     # Reload category tree