Are you talking about the 'Available Tags' list in the upper left corner of the replayer?
replayer available tags list.png
This feature request has been documented in detail and provided to the developers for future consideration. *
HMT-5829 - Replayer: Available Tags are sorted in order created instead of alphabetically like in the Reports hands grid
If you want to be notified if/when it is added please
send an email via the 'Contact Support' link and include "Notify Me When HMT-5829 Is Resolved" in the subject line and body of the email.
If you are referring to something else please explain again in more detail and attach some screenshots