Try this:
$array = array(
'systems' => array(
1 => 1111,
2 => 2222,
3 => 3333,
4 => 4444,
5 => 5555
),
'test' => 'on'
);
foreach ($array['systems'] as $key => $value) {
echo 'System "' . $key . '" has "' . $value . '" value.'."
\n";
}
if your name of your variable is $array
.