到目前为止，这个解决方案似乎有效。

    add_filter(\'screen_layout_columns\', \'one_column_on_screen_options\');
function one_column_on_screen_options($columns) {
    $columns[\'post\'] = 1;
    return $columns;
}

// Ignore user preferences stored in DB, and serve only one column layout    
add_filter(\'get_user_option_screen_layout_post\', \'one_column_layout\');
function one_column_layout($option) {
    return 1;
}

add_action( \'add_meta_boxes_sliding_panel\', \'sds_do_meta_boxes\', 0, 1 );
function sds_do_meta_boxes( $post )
{
    remove_meta_box( \'submitdiv\', \'sliding_panel\', \'side\' );
    add_meta_box( \'submitdiv\', __( \'Publish\' ), \'post_submit_meta_box\', \'sliding_panel\', \'normal\', \'high\', null );
}


function translate_publish( $translated_text, $untranslated_text, $domain ) {
    if( stripos( $untranslated_text, \'Publish\' ) !== FALSE ) {
        $translated_text = str_ireplace( \'Publish\', \'Save\', $untranslated_text ) ;
    }
    return $translated_text;
}
if(is_admin()){
    add_filter( \'gettext\', \'translate_publish\', 99, 3 );
}