parallelizing a nested loops

I have tried use parpool and parfor on these nested loops, but due to inter-dependencies I wasn't successful. Can anyone help me with parallelizing this?

%p.s: samples is constant

 for(a=1:size(bench,1))
      for(d=1:size(bench,2))
          allGuesses = sampleModel(BNmodel_loo(a), bench(a,d).micaNorm, samples);

          predTable((index):(index+samples-1),:) = allGuesses(:,(BNmodel_loo(a).pca.length+1):end);

          dataSetId(index:(index+samples-1)) = d;
          appNames(index:(index+samples-1)) = bench(a,d).application;

          index = index+samples;
      end
  end

Appreciate any helps,

-Amir