不幸的是，WP是hardcoded to generate taxonomy metaboxes in that side location.

它非常脆弱，但可以将生成的数据从一个位置扔到另一个位置：

add_action( \'add_meta_boxes\', \'move_taxonomy_metabox\' );

function move_taxonomy_metabox() {

    global $wp_meta_boxes;

    $taxonomy    = \'test\';
    $metabox_key = \'tagsdiv-\' . $taxonomy; // or $taxonomy . \'div\' if hierarhical

    if ( isset( $wp_meta_boxes[\'post\'][\'side\'][\'core\'][$metabox_key] ) ) {

        $metabox = $wp_meta_boxes[\'post\'][\'side\'][\'core\'][$metabox_key];
        unset( $wp_meta_boxes[\'post\'][\'side\'][\'core\'][$metabox_key] );
        $wp_meta_boxes[\'post\'][\'normal\'][\'core\'][$metabox_key] = $metabox;
    }
}