Yes, you can manually edit all tags with the tag edit dialog (right mouse in tag list window - Modify Tags) or you make it with this macro (modify the 2 paths according to your installation):
Open "C:\Program Files\UltraEdit-32\taglist.txt"
Find "[Tag Group - HTML - Tags]"
Key DOWN ARROW
Find Select "^p^p"
Key RIGHT ARROW
SaveAs "C:\Program Files\UltraEdit-32\MyTaglist.txt"
Don't forget to enable the macro property Continue if a Find with Replace not found which must be set for this macro.
The macro saves the modified taglist file to a new name. I think this is better than modifying the original because the Taglist.txt file is always updated during an update of UltraEdit. Although the update is done with a notification and creation of a backup, many users have a compulsion to click on OK buttons without reading.
To use this new modified taglist file instead of original open the modify tags dialog as described above and click on the Browse button to select MyTaglist.txt.
Best regards from Austria