Keep menu item disabled

You can disable the default action by JavaScript .

With jQuery:

$("a[href='cadastrar.php']").click(function (e) {
    e.preventDefault();
});

With native JavaScript:

var el = document.querySelectorAll("a[href='cadastrar.php']");

el[0].addEventListener("click", function(e){
    e.preventDefault();
});

You can do this with css and leaving no link within the href:

.link{
cursor:auto;
}

<li><a class="link" href='#'>CADASTRAR</a></li>