Collections: Custom sidebar menu
Collections can have custom navigation using a nested link-list or standard navigation by collection, type, vendor, or tag. To use a custom navigation, create a linklist in the Navigation portion of your admin, and select it as your Custom Link List in the Pipeline theme settings under Collection Pages.
Create a custom navigation menu
Create a new menu in the navigation editor which will be used just for your collections sidebar:
After adding your menu items, save the new navigation.
Choose the new menu in your Collection page settings
Open your theme editor:
From the top drop-down menu (1), choose Collection pages (2)
The sidebar options will change, choose Collection page (3)
In the Collection page options, choose the Custom link list option under Sidebar Menu:
The new menu will appear at the top of the sidebar:
Save your changes.
Demonstration for Pipeline 1.x