使用过滤器，我们可以防止Trash 正在打印的链接
如果用户试图直接访问URL，则使用该操作重定向回“发布列表”页面(/wp-admin/edit.php?post_status=trash&post_type=post).

add_filter( \'views_edit-post\', \'wpse_74488_remove_trash_link\' );
add_action( \'admin_head-edit.php\', \'wpse_74488_block_trash_access\' );

function wpse_74488_remove_trash_link( $views ) 
{
    if( !current_user_can( \'delete_plugins\' ) )
        unset( $views[\'trash\'] );

    return $views;
}

function wpse_74488_block_trash_access()
{
    global $current_screen;

    if( 
        \'post\' != $current_screen->post_type 
        || \'trash\' != $_GET[\'post_status\'] 
    )
        return;

    if( !current_user_can( \'delete_plugins\' ) )
    {
        wp_redirect( admin_url() . \'edit.php\' ); 
        exit;
    }
}