Right click on the tag above the place you want to add a new tag. Select New Tag from the list of options.
In the New Tag dialogue box, select List from the Type options. Choose OK. An empty (without content) list tag will appear in the Tags Pane.
Hold down the Shift Key and select each of the tags you wish to change to List Items. The text in the document should have a blue boxes around them. R ight click (Windows) or command click (Mac OS) the first tag in the selection and choose Properties from the list of options.
In the Object Properties dialogue box, select the Type drop down and choose List Item from the list of options. You can also type "List Item" into the Type field, but be sure to use the correct name with capitalization. The Type field is case sensitive. Each of the selected tags will update to <LI> tag.
While the new list items are still selected, right click the first List Item tag and choose Cut from the list of options. The list items will gray out. Next, right click the empty <L> tag and choose Paste Child from the list of options.