category modules

Hi,

on my left side of my website i have a module that displays all categories.
when user clicks on 1 of those category menu item, a products list is displayed on content div.
the breadcrumb in this case is Home > e-Shop (real name was "Menu item for category listing module 181") > My category.

In case user clicks on: e-Shop (real name was "Menu item for category listing module 181") the content div shows all categories, and this is something i don't want.
in fact, i would like if user clicks on that link to display a complete products list, instead of categories list.

How can i do that ?
thank a lot,

A.