Service to course.php

add_action( 'init', 'service_change_labels', 20 );

function service_change_labels() {
    $p_object = get_post_type_object( 'service' );

    if ( !$p_object ) {
        return FALSE;
    }
    // see get_post_type_labels()
    $p_object->label                      = 'Courses';
    $p_object->labels->name               = 'Courses';
    $p_object->labels->singular_name      = 'Course';
    $p_object->labels->add_new            = 'Add Course';
    $p_object->labels->add_new_item       = 'Add new Course';
    $p_object->labels->all_items          = 'All Courses';
    $p_object->labels->edit_item          = 'Edit Course';
    $p_object->labels->name_admin_bar     = 'Course';
    $p_object->labels->menu_name          = 'Course';
    $p_object->labels->new_item           = 'New Course';
    $p_object->labels->not_found          = 'No Courses found';
    $p_object->labels->not_found_in_trash = 'No Courses found in trash';
    $p_object->labels->search_items       = 'Search Courses';
    $p_object->labels->view_item          = 'View Course';

    //var_dump( $p_object );
    return TRUE;


}