By default the subcategories are displayed in Grid view only in Ecwid.
It is ppossibe to display them in List view with a custom list, built by hand. However the very first thing I should clarify is the following: this mod will not change the way the categories are currently displayed in Ecwid. It will only hide the default categories and create a custom list of categories, that you will need to manage manually. I.e. if you delete some category from Ecwid, it will not disappear from this custom list automatically, you will need to remove it manually.
In general this modification can be made as follows:
1. You should log in to your Ecwid control panel and open, for example, the "Kitchenware" category description (Ecwid control panel -> Catalog->Categories-> Kitchenware -> click on “HTML” icon in the editor panel) and for each subcategory in this category add a line like that:
<img src="http://images.ecwid.com/images/1103205/33765389.jpg"><a href="http://oaktreeave.com/#ecwid:category=2471652&mode=category&offset=0&sor t=nameAsc"All-Clad</a> - short_descriprion_text>
Of course, each subcategory should have its own image path and link specified. Save the changes (click "Save (Ctrl+S)").
2. After that you will need to hide the existing subcategories by adding the following CSS rule to your CSS theme (Ecwid control panel -> System Settings -> Design -> CSS Themes):
Then click Save (Ctrl+S).