no arquivo functions.php
function wpmu_register_widgets() {
register_sidebar(array(
'name' => 'level_up_new_widget_area',
'id' => 'level_up_new_widget_area',
'before_widget' => '<div class="widget-instagram">',
'after_widget' => '</div>',
'before_title' => '<h3>',
'after_widget' => '</h3>'
));
}
add_action( 'widgets_init', 'wpmu_register_widgets');
no template da pagina
<?php if ( !dynamic_sidebar('level_up_new_widget_area')) : ?><?php endif; ?>
Espero que sirva!