I think it is not quite clear what your result should be. One of your "doubles"-matrecies is already enough to plot a 3D-Bar plot. What you do is plotting multiple plots in the same figure. If this is your desired solution I don't think it is possible to remove the for-loop.
Still your (wanted solution) should result in a very messy figure. I made a simplified example in the form of your data below. You can see that the bars intersect each other and it is not really good to use as a visualization.
You can check the 'grouped' option in the documentation, which allows different bars at the same position. This would obviously need code adaptation. And on a datasize of yours the bars would probably be very hard to see.
As a tipp, you should create a small example with your data and work with this first, to avoid long loading times.
PS: The bracket "(" in front of cell2mat in your code is to much
N = {{[1,2,3,4,5; 6,7,8,9,10]},
{[1,2,3,4,5; 6,7,8,9,10]*2},
{[1,2,3,4,5; 6,7,8,9,10]*3},
{[1,2,3,4,5; 6,7,8,9,10]*4}};
M = {N};
figure(1); clf; hold on;
Az = (1:1:5);
for t1 = 1:length(M{1})
for t2 = 1:length( M{1}{t1} )
bar3(Az, cell2mat(M{1}{t1}(t2))');
end
end
view([-25.10 33.53])
