Function to create matrix with different starting elements per row

I created the following matrix: A with random numbers 1-8, each element with 4 repetitions, A has 6rows, 32columns. I know there are more elegant ways to do this, but I am a matlab beginner, therefore I used the knowledge I have...

 A1 = [1:8,1:8,1:8,1:8];
A1 = A1(randperm(length(A1)));
A2 = [1:8,1:8,1:8,1:8];
A2 = A2(randperm(length(A2)));
A3 = [1:8,1:8,1:8,1:8];
A3 = A3(randperm(length(A3)));
A4 = [1:8,1:8,1:8,1:8];
A4 = A4(randperm(length(A4)));
A5 = [1:8,1:8,1:8,1:8];
A5 = A5(randperm(length(A5)));
A6 = [1:8,1:8,1:8,1:8];
A6 = A6(randperm(length(A6)));
Aall(1,:)=A1;
Aall(2,:)=A2;
Aall(3,:)=A3;
Aall(4,:)=A4;
Aall(5,:)=A5;
Aall(6,:)=A6;

Now I want to make sure that the first element of each row is unequal to the previous one, using a function. I struggle with creating this function...any help is appreciated!