Código PHP:
Ver original<!DOCTYPE html>
<!--[if lt IE 7]>
<html class="no-js lt-ie9 lt-ie8 lt-ie7">
<![endif]-->
<!--[if IE 7]>
<html class="no-js lt-ie9 lt-ie8">
<![endif]-->
<!--[if IE 8]>
<html class="no-js lt-ie9">
<![endif]-->
<html lang="es">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title><?php include('seo.php'); echo $titulo;?></title>
<meta name="description" content="<?php include('seo.php'); echo $descripcion;?>">
<meta name=robots content="<?php include('seo.php'); echo $indexar;?>"/>
<link rel="shortcut icon" href="icons/favicon.ico">
<!-- Bootstrap core CSS -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- Custom styles for this template -->
<link rel="stylesheet" href="scss/style.css">
<!-- Bootstrap core CSS -->
<link href="css/animate.css" rel="stylesheet">
<link href="css/flexslider.css" rel="stylesheet">
<link href="css/sm-light.css" rel="stylesheet">
<link href="css/owl.carousel.css" rel="stylesheet">
<link href="css/owl.theme.css" rel="stylesheet">
<link href="css/venobox.css" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,400i,500" rel="stylesheet">
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container-full">
<div class="row">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="index.php">
<img src="images/logo_semi_final.png" alt="SolyMail">
</a>
</div>
<div class="collapse navbar-collapse">
<ul class="nav navbar-nav" id="top-nav">
<li class="active">
<a href="index.php">Inicio</a>
</li>
<li>
<a href="caracteristicas.php">Características</a>
</li>
<li>
<a href="clientes.php">Clientes</a>
</li>
<li>
<a href="ayuda">Ayuda</a>
</li>
</ul>
<ul class="menu-extra">
<li class="telefono">(01) 310-8108</li>
<li><a href="contacto.php" class="border_white-solid_cian btn-lg">Contacto</a></li>
</ul>
</div>
<!--/.nav-collapse -->
</div>
<!-- .row -->
</div>
</div>