Splitting stationary sets in p(λ)

Let A be a non-empty set. A set S ⊆ P (A) is said to be stationary in P(A) if for every f: [A]<ω → A there exists x ∈ S such that x ≠ A and f"[x]<ω ⊆ x. In this paper we prove the following: For an uncountable cardinal λ and a stationary set S in P(λ), if there is a regular uncountable cardinal k ≤ λ such that {x ∈ S : x ∩ k ∈ k} is stationary, then S can be split into k disjoint stationary subsets.