如何将MPTT层次结构数据正确排序为多维数组。

I'm trying to figure out how to write a function that returns a multidimensional array. I know how to write the function using the "category_parent" value. But I'm just trying to write a function that can create a multidimensional array by ONLY using the left and right keys.I'm trying to figure out how to write a functio