How to change issues

Change at the custom-posttype.php

function my_issues() {
    global $data;
    register_post_type(
        'issues',
        array(
            'labels' => array(
                'name' => 'Issues',
                'singular_name' => 'issues'
            ),
            'public' => true,
            'has_archive' => false,
             'rewrite' => array('slug' => 'custom-issues', 'with_front' => FALSE),
            'can_export' => true,
            'show_in_nav_menus' => false,
            'capability_type' => 'post',
            'menu_position' => 5,         
            'supports' => array('title', 'editor','thumbnail') 
        )
    );
}

custom-issues - the new permalink