In order to install vertical categories on your site instead of horizontal ones you should copy “Categories Menu Widget Code” widget code in Ecwid control panel → Dashboard and paste it in the source page of your site, where this menu should be installed.
If you what that vertical categories menu shows on all site’s pages and links to the page, where the product browser widget is installed, you should use ecwid_ProductBrowserURL
variable. Please, refer to this article for details: http://kb.ecwid.com/w/page/15853260/...
Maria Nikiforova, Ecwid Team
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