<!-- Header Navbar: style can be found in header.less -->
<nav class="navbar navbar-static-top" role="navigation">
<!-- Sidebar toggle button-->
<a href="#" class="sidebar-toggle" data-toggle="offcanvas" role="button"></a>
<!-- navbar menu -->
<div class="navbar-custom-menu">
<ul class="nav navbar-nav">
<!-- Nombre Usuario -->
<li class="dropdown user user-menu">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
<img src="http://localhost/web/interfaz/dist/img/user2-160x160.jpg" class="user-image" alt="User Image">
<span class="hidden-xs"><?php
Principal::obtener_nombre($_SESSION['usuario_id']);
?>
</span>
</a>
<ul class="dropdown-menu">
<!-- User image -->
<li class="user-header">
<img src="http://localhost/web/interfaz/dist/img/user2-160x160.jpg" class="img-circle" alt="User Image">
<p>
Jaime - Desarrollador web
<small>Miembro desde Dic. 2015</small>
</p>
</li>
<!-- Menu Body -->
<li class="user-body">
<div class="col-xs-4 text-center">
