I just got off work, and tired, and not fulling comprehending what you're asking. You want it so that when someone types !attack <nick> while you're an Op in a channel, it displays a link with <nick> at the end? Sounds easy enough, but I'm not sure that's exactly what you're wanting. try
if ($me isop $chan) .msg $chan http://blablabla.attack.rushy.com?php=id? $+ $$2
Just change #ChannelName to your Channel, and edit the url to whatever url you want. If this isn't exactly what you're asking for, I apologize.