我网站的帖子有一、二、三类，这取决于文章。我的菜单由类别组成。当我选择post（打开整篇文章）时，它会在菜单中显示post类别。

问题：当我选择这样的文章谁有两个类别，时间菜单显示两个菜单选择。how can i show only one category （第一类）？

foreach ( (array) $menu_items as $key => $menu_item ) {

    $menu_items[$key]->current = false;

    $classes = (array) $menu_item->classes;
    $classes[] = \'menu-item\';
    $classes[] = \'menu-item-type-\' . $menu_item->type;
    $classes[] = \'menu-item-object-\' . $menu_item->object;

    // if the menu item corresponds to a taxonomy term for the currently-queried non-hierarchical post object
    if ( $wp_query->is_singular && \'taxonomy\' == $menu_item->type && in_array( $menu_item->object_id, $possible_object_parents ) ) {
        $active_parent_object_ids[] = (int) $menu_item->object_id;
        $active_parent_item_ids[] = (int) $menu_item->db_id;
        $active_object = $queried_object->post_type;

    // if the menu item corresponds to the currently-queried post or taxonomy object
    } elseif (
        $menu_item->object_id == $queried_object_id &&
        (
            ( ! empty( $home_page_id ) && \'post_type\' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id ) ||
            ( \'post_type\' == $menu_item->type && $wp_query->is_singular ) ||
            ( \'taxonomy\' == $menu_item->type && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax ) && $queried_object->taxonomy == $menu_item->object )
        )
    ) {
        $classes[] = \'current-menu-item\';
        $menu_items[$key]->current = true;
        $_anc_id = (int) $menu_item->db_id;

        while(
            ( $_anc_id = get_post_meta( $_anc_id, \'_menu_item_menu_item_parent\', true ) ) &&
            ! in_array( $_anc_id, $active_ancestor_item_ids )
        ) {
            $active_ancestor_item_ids[] = $_anc_id;
        }

        if ( \'post_type\' == $menu_item->type && \'page\' == $menu_item->object ) {
            // Back compat classes for pages to match wp_page_menu()
            $classes[] = \'page_item\';
            $classes[] = \'page-item-\' . $menu_item->object_id;
            $classes[] = \'current_page_item\';
        }
        $active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
        $active_parent_object_ids[] = (int) $menu_item->post_parent;
        $active_object = $menu_item->object;

    // if the menu item corresponds to the currently-requested URL
    } elseif ( \'custom\' == $menu_item->object ) {
        $_root_relative_current = untrailingslashit( $_SERVER[\'REQUEST_URI\'] );
        $current_url = set_url_scheme( \'http://\' . $_SERVER[\'HTTP_HOST\'] . $_root_relative_current );
        $raw_item_url = strpos( $menu_item->url, \'#\' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, \'#\' ) ) : $menu_item->url;
        $item_url = untrailingslashit( $raw_item_url );
        $_indexless_current = untrailingslashit( preg_replace( \'/\' . preg_quote( $wp_rewrite->index, \'/\' ) . \'$/\', \'\', $current_url ) );

        if ( $raw_item_url && in_array( $item_url, array( $current_url, $_indexless_current, $_root_relative_current ) ) ) {
            $classes[] = \'current-menu-item\';
            $menu_items[$key]->current = true;
            $_anc_id = (int) $menu_item->db_id;

            while(
                ( $_anc_id = get_post_meta( $_anc_id, \'_menu_item_menu_item_parent\', true ) ) &&
                ! in_array( $_anc_id, $active_ancestor_item_ids )
            ) {
                $active_ancestor_item_ids[] = $_anc_id;
            }

            if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ) ) ) {
                // Back compat for home link to match wp_page_menu()
                $classes[] = \'current_page_item\';
            }
            $active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
            $active_parent_object_ids[] = (int) $menu_item->post_parent;
            $active_object = $menu_item->object;

        // give front page item current-menu-item class when extra query arguments involved
        } elseif ( $item_url == $front_page_url && is_front_page() ) {
            //$classes[] = \'current-menu-item\';
        }

        if ( untrailingslashit($item_url) == home_url() )
            $classes[] = \'menu-item-home\';
    }

    // back-compat with wp_page_menu: add "current_page_parent" to static home page link for any non-page query
    if ( ! empty( $home_page_id ) && \'post_type\' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id )
        $classes[] = \'current_page_parent\';

    $menu_items[$key]->classes = array_unique( $classes );
}`