A simple script to allow sorting of custom posts in admin?

That script doesn’t allow sorting, just displaying a custom column. Is that the original script or the modified one?

Note that register_post_type() and register_taxonomy() shouldn’t be called directly, but in a callback hooked to the ‘init’ action. Working version:

function my_init() {
    register_post_type( 'frog', array(
        'labels' => array(
            'name' => 'Frog',
            'singular_name' => 'Frog',
            'add_new' => 'Add New',
            'add_new_item' => 'Add New frog',
            'edit_item' => 'Edit frog',
            'edit' => 'Edit',
            'new_item' => 'New frog',
            'view_item' => 'View frog',
            'search_items' => 'Search frogs',
            'not_found' => 'No frogs found',
            'not_found_in_trash' => 'No frogs found in Trash',
            'view' => 'View frog'
        ),
        'public' => true,
        'capability_type' => 'post',
        'hierarchical' => false,
        'rewrite' => true,
        'query_var' => true,
        'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'custom-fields', 'comments' ),
        'taxonomies' => array('category','post_tag')
        )
    );
    register_taxonomy(
        'frog_category',
        'frog',
        array(
            'hierarchical' => true,
            'label' => 'Categories',
            'public' => true,
            'query_var' => true,
            'show_tagcloud' => true,
            'rewrite' => Array(
                'slug' => 'frog_category')
            )
    );
}

function add_new_frogcolumns($defaults) {
    $defaults['frog_cats'] = __('Categories');//frog_cats relates to? 
    return $defaults;
}
function add_frogcolumn_data( $column_name, $post_id ) {
    if( $column_name == 'frog_cats' ) {
        $_posttype="frog";
        $_taxonomy  = 'frog_category';
        $terms      = get_the_terms( $post_id, $_taxonomy );
        if ( !empty( $terms ) ) {
            $out = array();
            foreach ( $terms as $c )
                $_taxonomy_title = esc_html(sanitize_term_field('name', $c->name, $c->term_id, 'category', 'display'));
                $out[] = "<a href="https://wordpress.stackexchange.com/questions/8903/edit.php?frog_category=$_taxonomy_title&post_type=$_posttype">$_taxonomy_title</a>";
            echo join( ', ', $out );
        }
        else {
            _e('Uncategorized');
        }
    }
}

add_action('init', 'my_init');
add_filter( 'manage_frog_posts_columns', 'add_new_frogcolumns' );
add_action( 'manage_frog_custom_column', 'add_frogcolumn_data', 10, 2 );