Is there any sort of adapter than would allow me to connect my sony ericsson speakers to my iphone?

I've attatched a photo which shows the cable that goes into the speakers
thank you Is there any sort of adapter than would allow me to connect my sony ericsson speakers to my iphone

I doubt that you will get an adapter though you could get the jack plug and chop the Sony plug off then fit the Jack plug to the cable but his is a lot of fiddly work which may be harder then just purchasing a set of headphones