在数组项，PHP上隐藏以前的数组项

i have this array

array [ 

    U => [],
    V => [],
    W => [],
    X => [],
    Y => [],
    Z => []

];

The array depicts a list of items that are shown on the page. I only want to show array items that follow the current item,

for example, if i was on item V , i only want to see

    W => [],
    X => [],
    Y => [],
       Z => []

One possibility is to increment a letter key. For example:

$current = 'V';

for ($letter = ++$current; $letter != 'AA'; $letter++) {
    // show the item at $array[$letter];
}