how can i do it on my forum???

[hostmela]

https://vborg.vbsupport.ru/external/2008/12/93.jpg

i want to make similar thing in my forum as shown above.
can any1 help
thanks in advance :)

[SEOvB]

vbulletin 3.7 has built in thread prefixes....

http://vbulletin.com/docs