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<?php

/**
 * Reorders and cleans up the administration menu to make it more user-friendly.
 *
 * @param  array $menuOrder The current array of menu items.
 * @return array            An updated order of the items that correspond to the menu.
 *
 * @link   https://codex.wordpress.org/Plugin_API/Filter_Reference/custom_menu_order
 */
function ccd_reorder_admin_menu( $menuOrder ) {
    
    if ( ! $menuOrder ) {
        return true;
    }

    return array(
        'index.php',
        'separator1',
        'edit.php',
        'edit.php?post_type=page',
        'edit.php?post_type=custom_type',
        'separator2',
        'upload.php',
        'users.php',
        'separator3',
        'themes.php',
        'plugins.php',
        'tools.php',
        'options-general.php',
        'separator-last',
    );
}
add_filter( 'custom_menu_order', 'ccd_reorder_admin_menu', 10, 1 );
add_filter( 'menu_order', 'ccd_reorder_admin_menu', 10, 1 );