Formulário form_open_multipart

<?php $this->load->view('admin/includes/head');?>

    <div class="col-md-10">
        <div class="content-box-large">
            <div class="panel-heading">
                <div class="panel-title"><h3><?= $label ?></h3></div>
            </div>
            <div class="panel-body">
                 <?php
                    if($msg = get_msg()):
                        echo '<div class="alert alert-warning" role="alert"><p>'.$msg .'</p></div>';
                    endif;
                    echo form_open_multipart('noticia/cadastrar');
                    ?>
                    <fieldset class="col-md-6">
                        <div class="form-group">
                            <label>Título</label>
                            <?= form_input(["name"=>"nome"], set_value("nome"), ["class"=>"form-control", "placeholder"=>"Título da notícia"]) ?>
                        </div>
                        <div class="form-group">
                            <label>Conteudo</label>
                            <textarea rows="5" name="conteudo" class="form-control" placeholder="Conteudo..."><?= set_value('conteudo') ?></textarea>
                        </div>
                        <div class="form-group">
                            <label>Imagem</label>
                            <input type="file" name="imagem" class="form-control">
                        </div>
                    </fieldset>
                    <fieldset class="col-md-6">
                        <div class="form-group">
                            <label>Autor</label>
                            <?= form_input('autor', set_value('autor'), ['class' => 'form-control', 'placeholder'=>'Nome do autor']) ?>
                        </div>
                        <div class="form-group">
                            <label>Categoria</label>
                            <select class="form-control" name="categorias">
                                <option value="default">--SELECIONE--</option>
                                <?php
                                    if(isset($categorias) && !is_null($categorias)):
                                        foreach($categorias as $categoria):
                                ?>
                                <option value="<?= $categoria->id ?>" <?= set_select('categorias', $categoria->id); ?> ><?= $categoria->nome ?></option>
                                <?php
                                        endforeach;
                                    endif;
                                ?>
                            </select>
                        </div>
                    </fieldset>
                    <div class="clearfix"></div>
                    <div>
                        <?php
                            echo form_submit('enviar', 'Salvar dados', ['class'=>'btn btn-primary signup']);
                        ?>
                    </div>
                <?php echo form_close(); ?>
            </div>
        </div>
    </div>

<?php $this->load->view('admin/includes/footer'); ?>