force one column layout on edit screen
//Force one column layout in edit screen function so_screen_layout_columns( $columns ) { $columns['post'] = 1; return $columns; } add_filter( 'screen_layout_columns', 'so_screen_layout_columns' ); function so_screen_layout_post() { return 1; } add_filter( 'get_user_option_screen_layout_post', 'so_screen_layout_post' );