What do you mean by copied? Ireland was colonised by the English for many years, and was part of their common law system during that period.

When it became independent, all laws weren't suddenly repealed, some were just ammended over time (as any common law system does). It's my understanding that Irish Courts can still refer to court cases from other common law countries in terms of precidence, even now

I guess that the legal framework that enables the orders was inherited by the Irish state. (according to wikipedia the orders can be made in Canada and Australia too)