Username replacer

For livejournal.com, lj.rossia.org, wordpress.org, ya.ru, blogs.mail.ru, lleo.aha.ru users only. <lj user=”username”/>, <lj user=”username”>, <lj comm=”community”/>, <lj comm=”community”>, <ljr user=”username”>, <ljr comm=”community”>, <wp user=”username”>, <ya user=”username”>, <mr user=”username”>, <mr comm=”community”>, <ll user=”username”>, <hb user=”username”>, <hb comm=”community”> and <bs user=”username”> will be replaces with correct HTML code.