Complex sentence: The remaining 8 male and 8 female contestants will advance to the 3rd and 4th round of the quarter-finals, and each of the male and female categories are now sub-divided into two groups of 4, in which 2 contestants will be eliminated in each group.
Split into simpler sentences: The remaining 8 guys and 8 women will advance to the 3rd and 4th round of quarter-finals. They are divided into male and female category too, and each of the male and female categories and sub-divided into two groups of 4, in which 2 contestants will be eliminated in each group.