$array = array(
    array('name' => 'civilian 1'), //Random
    array('name' => 'civilian 2'), //Random
    array('name' => 'civilian 3'), //Random
    array('name' => 'civilian 4'), //Random
    array('name' => 'civilian 5'), //Random
    array('name'=>'Rich', 'desc' => 'I am a Sponsor'), //Keep at the top
    array('name'=>'Rich 2', 'desc' => 'I am a Sponsor'), //Keep at the top
            );

if `desc has any string` will keep at the top   
else if `desc is null` will random after `desc has any string`'s array

Example 1 Output

name: Rich
name: Rich 2
name: civilian 3
name: civilian 2
name: civilian 5
name: civilian 4
name: civilian 1

Example 2 Output

name: Rich
name: Rich 2
name: civilian 4
name: civilian 5
name: civilian 2
name: civilian 1
name: civilian 3

Çok teşekkürler.