Change Text in CRM Web Client UI (Search Dropdowns)

Hi is there a way to change the text within CRM Web Client UI....for the text that appears in dropdowns?

For example if I wanted to change the text from "Urgent Change" to "Emergency Change" where would I do this? The transaction type (ZMHF) has been updated with the correct text in the GUI but not sure how to update this particular section below.

Image may be NSFW.
Clik here to view.

Is this possible?

Thanks

Shaun