How to handle the output of 4x4 blockproc for calculating zigzag of a matrix in Matlab?

Hi, I have the following matrix as input of 4x4 blocproc in matlab:

      imgTest2 = ...
      [1 2 3 4 5 6 7 8;
      1 2 3 4 5 6 7 8;
      1 2 3 4 5 6 7 8;
      1 2 3 4 5 6 7 8;]

Now I have used blockproc as below:

      %Block Processing for getting the zigzag of the imgTest2 matrix
      fun2 = @(block_struct) ...
          zigzag2(block_struct.data);

      zz2 = blockproc(imgTest2,[4 4],fun2);

The zigzag2 function is used to get the zigzag of each 4x4 block of the input array.

Now, the problem is, I want each 4x4 block's zigzag into different rows of zz2 vector. But unfortunately, if I run it, zz2 becomes 1x32. I want 16 value (from each block, zigzagged) from each block in different rows.

This is just a sample data. I will run this on a higher resolution image and want each block's zigzag in different rows.

Looking forward for your kind suggestion.

Thank you.