Why does my minecraft server have [Factions-spawn]< in front of players chat names?

Okay my friend mad a server and we where fixing all he bugs and everything he might have got a plugin i really don't know that inputted the "[factions-spawn]<" in front of every players name for some reason but I'm hoping that somebody has had similar problems and can help me fix this soon.

Try this link for help… You can also bring up others by entering MINECRAFT SUPPORT in your web browser

http://minecraftsupport.com/