What you can do is to update the action that is used to insert list items, to change the fragment that is inserted in the document (from <li/>
For example, for DITA document type (this is similar for other built-in frameworks) you have to go to "Options"->"Preferences"->"Document Type" option page, select the DITA document type and press "Edit". All the actions are defined in "Author" tab, "Actions" subtab.
To update the list item action follow these steps:
- Select the list item action from the actions list (it has the "listitem" ID) and press "Edit". The "Action" dialog is opened.
- In the "Operations" section you will see that there are multiple operations defined, each of them being activated in a specific context (see the XPath expresion that must be evaluated to determine when the operation is applied). You have to search for all the operations that are executed in the context of ol or ul and change the corresponding fragment argument from to.
The "listitem" action is added by default in the Toolbar, but you can add it also in the content completion list.
To do that, go back to document type edit dialog, "Author" tab, "Content Completion" subtab, select the action from the "Available actions" section and add it to the "Current actions" section.
Please let me know if you need further information.