functions.php

/**
     * This feature enables custom-menus support for a theme.
     * @see http://codex.wordpress.org/Function_Reference/register_nav_menus
     */
    register_nav_menus(array(
        'top'         => __( 'Fixed Header Top Menu', 'catch-flames' ),
        'primary'     => __( 'Primary Menu', 'catch-flames' ),
    ) );

header.php

wp_head();

/**
<?php
    if ( has_nav_menu( 'primary' ) ) {
        $args = array(
            'theme_location'    => 'primary',
            'container_class'     => 'menu-header-container wrapper',
            'items_wrap'        => '<ul class="menu">%3$s</ul>'
        );
        wp_nav_menu( $args );
    }
    else {
        echo '<div class="menu-header-container wrapper">';
            wp_page_menu( array( 'menu_class'  => 'menu' ) );
        echo '</div>';
    } ?>
    <?php if ( has_nav_menu( 'top' ) ) :
                echo '<nav id="access-top" role="navigation">';
                    $args = array(
                        'theme_location'    => 'top',
                        'container'         => false,
                        'items_wrap'        => '<ul id="top-nav" class="menu">%3$s</ul>'
                    );
                    wp_nav_menu( $args );
                echo '</nav><!-- #access -->';
            endif; ?>

wp_nav_menu( array $args = array() ) https://developer.wordpress.org/reference/functions/wp_nav_menu/ Displays a navigation menu.

<div id="header-top" class="menu-with-logo">
<nav id="access-top" role="navigation">

            <?php echo '<b>test123</b>'; ?>

TablePress https://tw.wordpress.org/plugins/wp-paginate/