Dear
Please follow steps:
1. Please open file CuteSoft_Client\CuteChat\Script\NewMessenger.js
2. You can find the following code in line 717:
if((contact.UserName).toLowerCase()!=(contact.DisplayName).toLowerCase())
sb.push("<div class='MessengerContactUserName'>"+CuteWebUI.HTML.Encode("<"+contact.UserName+">")+"</div>");
3. Please comment these two lines
4. Test it again. I have tried it on my end, it works.
Thank you for asking