I use ultimo 1.15.2. In home page I can enable/disable this left sidebar by going through: System -> Configuration ->Infortis Extensions -> Menu -> Sidebar Menu -- and choose the option i want for Home page(Left sidebar), but I want also to enable it for Category View (Left Sidebar), so i've chosen Enable for it. Unfortunately when I click on a category and it send me to Category View page this left sidebar do not appear.
Category View page:
PS: Sorry for bad english.
You can see that, layout handle for default categories catalog_category_default actually defines a left section. It looks like this.
<catalog_category_default translate="label"> <label>Catalog Category (Non-Anchor)</label> <reference name="left"> <block type="catalog/navigation" name="catalog.leftnav" after="currency" template="catalog/navigation/left.phtml"/> </reference> ... </catalog_category_default>
This means it uses the block of type catalog/navigation in the left section. This block is actually responsible for the left content that you are viewing in a default category
You can also follow this link:
It might help you.