Route error in php

Question

I started developing a system using the codeigniter framework 3. In localhost I had no problems with routes, but after I put the system on the server started showing problems in the views routes.

Problem:

404 Page Not Found

I inspected the code by browser and in the network tab, when clicking on the link that directs me to view, presents the same problem.

Note: The file has been changed config.php, in which I changed the line of the code $config['base_url'] to get the url of the server.

php 5.6 is installed.

Follow the file .htaccess

RewriteEngine on
RewriteCond $1 !^(index\.php|assets|images|js|css|uploads|favicon.png)
RewriteCond %(REQUEST_FILENAME) !-f
RewriteCond %(REQUEST_FILENAME) !-d
RewriteRule ^(.*)$ ./index.php/$1 [L]

Follow a code with the view links:

 <ul class="treeview-menu">
                        <?php if($this->session->userdata("perfil") == 1): ?>
                            <li><a href="<?php echo base_url();?>manutencao/categorias"><i class="fa fa-circle-o"></i> Categorias</a></li>
                            <li><a href="<?php echo base_url();?>manutencao/clientes"><i class="fa fa-circle-o"></i> Clientes</a></li>
                            <li><a href="<?php echo base_url();?>manutencao/produtos"><i class="fa fa-circle-o"></i> Produtos</a></li>
                            <li><a href="<?php echo base_url();?>manutencao/responsaveis"><i class="fa fa-circle-o"></i> Responsáveis</a></li>
                        <?php endif; ?>
                        <li><a href="<?php echo base_url();?>manutencao/ordens"><i class="fa fa-circle-o"></i> Ordens de Serviço</a></li>
                    </ul>

Thank you.