Customization of navigation menu is easy. Code for navigation menu is given below
1.HTML Customize
<!– Themefisher Navigation –>
<div class="overlay overlay-hugeinc">
<button type="button" class="overlay-close th-close-btn"><i class="tf-ion-close"></i></button>
<nav>
<ul class="th-nav">
<li><a href="index.html">Home</a></li>
<li><a href="services.html">Services</a></li>
<li><a href="portfolio.html">Portfolio</a></li>
<li><a href="blog.html">Blog</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</nav>
</div><!–/.End Nav –>
You can add or replace the text for customizing the nav in li tag.
If you add new li on the navigation menu you have to add the page in href attribute for link that page.
Use dropdown class to for add dropdown menus. For more details visit bootstrap nav page – https://getbootstrap.com/docs/3.3/components/#navbar