In this recipe, we will override the Views template used to render table styles. In particular, we will be overriding the standard table used to display the Tracker View in order to allow the spanning of rows of the same node type.
The Views module comes with a default View named Tracker which provides the same functionality as the Tracker module by providing a table listing nodes that the current user has either created or participated in. This View can be enabled from the Views administration page at
admin/structure/views [Home | Administration | Structure | Views]. If it has already been modified, it might be best to revert the view to its default settings prior to continuing.
As we will ...