portal_editorial/partes/menu_2.php

<div class="container">
    <section class="row">
        <div class="col-lg-3 col-md-3 col-sm-3">
            <ul>
                <li class="categoria">Categorias</li>
                <li class="left-menu">Nuestros Libros</li>
                <li class="left-menu">E-Books</li>
                <li class="left-menu">Eventos</li>

                <li class="left-menu">Blog</li>
                <li class="left-menu">Contacto</li>
            </ul>

            <img class="third-slide" src="<?php echo get_template_directory_uri();?>/slider/assets/publicidad.jpg" alt="">

        </div>