Custom Columns

// Custom columns
    function custom_columns($args) {
        $args = array('cb' => '<input type="checkbox" />', 'title' => __('Title'), 'thumbnail' => __('Thumbnail'), 'author' => __('Author'), 'categories' => __('Categories'), 'tags' => __('Tags'), 'date' => __('Date'));
        return $args;
    }
    add_filter('manage_edit-slides_columns', 'custom_columns');