Adding Category option at the backend

Everything works perfectly !
It will be awesome if the plugin has an option to choose category from the backend , like option for draft / publish / private and post type!

I tried to insert the code below in automatic-featured-image-posts.php but , options are displaying but its not working … can somebody help me out with this issue!

public function output_default_post_category_text() {
		$afip_options = get_option( 'afip_options' );

		if ( ! isset( $afip_options['default_post_category'] ) )
			$afip_options['default_post_category'] = $this->post_category;
		?>

<?php $categories= get_categories(); echo "<select id='afip_default_post_category' name='afip_options[default_post_category]'>"; foreach ($categories as $cat) { $selected = ($cat->cat_name==$options['amp_cat']) ? 'selected="selected"' : ''; echo "<option value='$cat->cat_name' $selected>$cat->name</option>"; } echo "</select>"; 

add_filter( 'afip_new_post_category', 'myprefix_change_afip_post_category', 10, 2 );
function myprefix_change_afip_post_category( $post_category, $attachment_id ) {

	$my_photo_category = $selected;

	if ( is_object( $my_photo_category ) )
		$post_category[] = $my_photo_category->term_id;

	return $post_category;

}

 ?>

https://wordpress.org/plugins/automatic-featured-image-posts/