从数组创建层次结构

I've an array as follows.

我的数组如下。

array(
    0 => array(
        'parent' => 'Bigboss',
        'middle' => 'Technicians',
        'child' => 'Players'
    ),
    1 => array(
        'parent' => 'Company',
        'middle' => 'Manager',
        'child' => 'Employees'
    ),
    2 => array(
        'parent' => 'Bigboss',
        'middle' => 'Manager',
        'child' => 'Workers'
    ),
    3 => array(
        'parent' => 'Company',
        'middle' => 'Techinical Lead',
        'child' => 'Employees'
    ),
    4 => array(
        'parent' => 'Bigboss',
        'middle' => 'Workers',
        'child' => 'Employees'
    )
);
array(