You can use randperm() to shuffle the values of array 'm'.
m =rand(180, 57, 11);
randpermIdx = randperm(numel(m));
mShuffle = reshape(m(randpermIdx), size(m));
To convince yourself that mShuffle is merely a random reorganization of m with no additional or missing values or duplicate samples, use this line below which should return True.