MATLAB: Manibulation of 3d matrix

3d matrix row

hi all! I have a matraix:

A(1,:,:)=[a1 a2 a3..;a11 a22 a33 ..;.....;]
B(1,:,:)=[b1 b2 b3..;b11 b22 b33 ..;.....;]

how could make the matrix C

 C=[a1 a2 a3..;b1 b2 b3..;a11 a22 a33 ..;b11 b22 b33 ..;.....;]

thank you!

A(:,:,1)=[1 2 3;4 5 6;7 8 9]
B(:,:,1)=[10 20 30 ;40 50 60;70 80 90]
[n,m]=size(A(:,:,1))
C=zeros(2*n,m)
C(1:2:end)=A(:,:,1)
C(2:2:end)=B(:,:,1)

X = reshape(cat(3,a,b,c),[],3)

a=zeros(4,7);
a(:,1:2:end)=A;
a(:,2:2:end)=B;
b=zeros(3,7);
b(:,1:2:end)=C;
b(:,2:2:end)=D;
out=zeros(7);
out(1:2:end,:)=a;
out(2:2:end,:)=b