Menu Dinamis

<?php
            $main_menu = $this->db->get_where('tabel_menu', array('is_main_menu' => 0))->result();
            foreach ($main_menu as $main) {
                // cek apakah ada submenu?
                $submenu = $this->db->get_where('tabel_menu', array('is_main_menu' => $main->id));
                if ($submenu->num_rows() > 0) {
                    //Tampilkan submenu disini
                    echo "<li class='nav-item'>
                    <a class='nav-link collapsed' href='#' data-toggle='collapse' data-target='#collapseTwo' aria-expanded='true' aria-controls='collapseTwo'>
                        <i class='" . $main->icon . "'></i>
                        <span>" . $main->nama_menu . "</span>
                    </a>";
                    foreach ($submenu->result() as $sub) {
                        echo "<div id='collapseTwo' class='collapse' aria-labelledby='headingTwo' data-parent='#accordionSidebar'>
                    <div class='bg-white py-2 collapse-inner rounded'>
                        <a class='collapse-item' href='buttons.html'>" . $sub->nama_menu . "</a>
                    </div>";
                    }
                    "</div>
                    </li>";
                }
            }
            ?>