Bootstrap pagination codeigniter

$config['full_tag_open'] = '<div class="pagination"><ul>';
		$config['full_tag_close'] = '</ul></div><!--pagination-->';
		 
		$config['first_link'] = '&laquo; Inicio';
		$config['first_tag_open'] = '<li class="prev page">';
		$config['first_tag_close'] = '</li>';
		 
		$config['last_link'] = 'Fin &raquo;';
		$config['last_tag_open'] = '<li class="next page">';
		$config['last_tag_close'] = '</li>';
		 
		$config['next_link'] = 'Siguiente &rarr;';
		$config['next_tag_open'] = '<li class="next page">';
		$config['next_tag_close'] = '</li>';
		 
		$config['prev_link'] = '&larr; Anterior';
		$config['prev_tag_open'] = '<li class="prev page">';
		$config['prev_tag_close'] = '</li>';
		 
		$config['cur_tag_open'] = '<li class="active"><a href="">';
		$config['cur_tag_close'] = '</a></li>';
		 
		$config['num_tag_open'] = '<li class="page">';
		$config['num_tag_close'] = '</li>';

		$config['base_url'] = base_url()."index.php/welcome/albums";
	    $config['total_rows'] = $this->db->get('USUARIOS')->num_rows();
	    $config['per_page'] = 6;
	    $config['num_links'] = 9;

	    $this->pagination->initialize($config);

	    $data['records'] = $this->db->get('USUARIOS', $config['per_page'], $this->uri->segment(3));

	    $this->load->view('libros',$data);