PHP Navigation Bar with array

@$nav_normal = array(
    "Home" => $locationHome,
    "(Un)Subscribe" => $locationSubscribe,
    "About Us" => $locationAbout,
    "Login" => $locationLogin
    );
@$nav_acp = array();


if(in_array($Nav_ID,$nav_normal)){

//Nav_ID will be set on the page itselves\/everything is defined correctly don't mind that\\
//What I want to do if the Nav_ID is in the $nav_normal array output the normal navbar else it will show the admincp nav bar\\