Write php file part name from jQuery $this value - php

Question

I'm trying to 'include' a php file in a html template when a nav-item is selectd. The code below make active the item on click it. What I want to do is, at the same time it becomes active,load the php file with de same name than '$this' value is. I mean:
on click in tab 'two' ($this value), load in div '#contFl' the php file named 'two.php' at time its become 'active'; load 'one.php' on click in 'one' item;...
Tried a few ways of text estructure in 'load(...)' -last one on last code line- with no results. Pleasefull to have some help.
<script type="text/javascript">
$(document).ready(function(){
$("ul.navbar-nav > li").click(function(e){
$("ul.navbar-nav > li").removeClass("active");
$(this).addClass("active");
$("#contFl").load('"'+$(this).val()+'.php');
});
})
HTML code of navbar
<div id="collapsibleNavbar" class="collapse navbar-collapse justify-content-around">
<ul id="collUl" class="navbar-nav col-12 col-lg-auto me-lg-auto mb-1 mb-md-0">
<li class="nav-item nav-link active" id="uno" role="button"><i class="fa fa-home" aria-hidden="true"></i> Inicio</li>
<li class="nav-item nav-link" id="dos" role="button"><i class="fa fa-envelope" aria-hidden="true"></i> Dos</li>
<li class="nav-item dropdown" id="tres"><a class="nav-link dropdown-toggle px-2" href="#" role="button" data-bs-toggle="dropdown"><i class="fa fa-list" aria-hidden="true"></i> Tres</a>
<ul class="dropdown-menu">
<a class="dropdown-item" href="index.php"><i class="fa fa-home" aria-hidden="true"></i> Inicio</a>
<a class="dropdown-item" href="tres.php"><i class="fa fa-list" aria-hidden="true"></i> Tres</a>
<a class="dropdown-item" href="dos.php"><i class="fa fa-envelope" aria-hidden="true"></i> Dos</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="cuatro.php"><i class="fa fa-user" aria-hidden="true"></i> Cuatro</a>
</ul>
</li>
<li class="nav-item nav-link" id="cuatro" role="button"><i class="fa fa-user" aria-hidden="true"></i> Cuatro</li>
</ul>
Code in template where include new php file.
<?php
include(ASSETS."/navbar.php");
include(ASSETS."/banner.php")?>
<div id="contFl" class="container-fluid">
<!-- HERE THE NEW 'INCLUDE' -->
</div>