PHP Navigation Bar with array

<?php

session_start();

include_once('config.php');
include_once('functions.php');


//The link names (=> "LINK NAME") MUST BE UNIQUE (unless you use multiple references with the same output!)!\\
//place acp links in nav_acp and normal links in $nav_normal!\\
//To add links through a variable save it in the config.php\\
//The navigation bar will also be shown as the following order of these array(s)\\
$nav_normal = array(
    $locationHome => "Home",
    $locationSubscribe => "(Un)Subscribe",
    $locationAbout => "About Us",
    $locationLogin => "Login"
    );


$nav_acp = array(
    $acpSetting => "Settings",
    $acpStyle => "Style",
    $acpEmailList => "Email List",
    $acpSendMail => "Send Email",
    $acpOperators => "Operators",
    $acpLogout => "Logout"
);

$last_normal = array_pop(array_keys($nav_normal));
$last_acp = array_pop(array_keys($nav_acp));

foreach($nav_normal as $link => $name){

    if($name == "Login"){
        if(isset($_SESSION['username']) && isset($_SESSION['password']) && isset($_SESSION['salt']) && isset($_SESSION['vsalt']) && isset($_SESSION['hashed'])){
            $username = $_SESSION['username'];
            $password = $_SESSION['password'];
            $saltkey = $_SESSION['salt'];
            $vsaltkey = $_SESSION['vsalt'];
            $getHashedPassWord = $_SESSION['hashed'];
            $hashedpass = hashing($password, $saltkey, $vsaltkey);
            if($hashedpass == $getHashedPassWord){
                continue;
            }else{
                header('location: '.$instalLocation.'/acp/index.php');
                echo('Error User Timed Out! 2');
            }
        }
    }

    if($Nav_ID == $name){
        ?><li class="Selected"><a href="<?php echo($link); ?>" class="menu"><?php echo($name); ?></a></li><?php
        if($link != $last_normal){
            echo("\n                    ");
        }else{
            echo("\n");
        }
    }else{
        ?><li class="Unselected"><a href="<?php echo($link); ?>" class="menu"><?php echo($name); ?></a></li><?php
        if($link != $last_normal){
            echo("\n                    ");
        }else{
            echo("\n");
        }
    }
}
?></ul>
<?php
if(isset($_SESSION['username']) && isset($_SESSION['password']) && isset($_SESSION['salt']) && isset($_SESSION['vsalt']) && isset($_SESSION['hashed'])){
    $username = $_SESSION['username'];
    $password = $_SESSION['password'];
    $saltkey = $_SESSION['salt'];
    $vsaltkey = $_SESSION['vsalt'];
    $getHashedPassWord = $_SESSION['hashed'];
    $hashedpass = hashing($password, $saltkey, $vsaltkey);
    if($hashedpass == $getHashedPassWord){
        echo("\n                    <ul>\n                  <h3>AdminCP Links</h3>\n                    ");
        foreach($nav_acp as $link => $name){
            if($Nav_ID == $name){
                ?><li class="Selected"><a href="<?php echo($link); ?>" class="menu"><?php echo($name); ?></a></li><?php
                if($link != $last_acp){
                    echo("\n                    ");
                }else{
                    echo("\n");
                }
            }else{
                ?><li class="Unselected"><a href="<?php echo($link); ?>" class="menu"><?php echo($name); ?></a></li><?php
                if($link != $last_acp){
                    echo("\n                    ");
                }else{
                    echo("\n");
                }
            }
        }
    }else{
        header('location: '.$instalLocation.'/acp/index.php');
        echo('Error User Timed Out! 2');
    }
}

?>