Orbit Slider as WordPress custom post type

wp-orbit-cpt.php

add_image_size( 'slider-image-large', 640, 280, true );

// Homepage Slider

add_action('init', 'register_dmc_orbit_slider');

function register_dmc_orbit_slider() {
 
	$labels = array(
		'name' => _x( 'Homepage Slider', 'post type general name' ),
		'singular_name' => _x( 'Homepage Slider', 'post type singular name' ),
		'add_new' => _x( 'Add New', 'Homepage Slider' ),
		'add_new_item' => __( 'Add New Homepage Slider' ),
		'edit_item' => __( 'Edit Homepage Slider' ),
		'new_item' => __( 'New Homepage Slider' ),
		'all_items' => __( 'All Homepage Sliders' ),
		'view_item' => __( 'View Homepage Slider' ),
		'search_items' => __( 'Search Homepage Sliders' ),
		'not_found' =>  __( 'No Homepage Sliders found' ),
		'not_found_in_trash' => __( 'No Homepage Sliders found in Trash' ),
		'parent_item_colon' => '',
		'menu_name' => 'Homepage Slider'
	
	  );
	  $args = array(
		'labels' => $labels,
		'public' => true,
		'query_var' => true,
		'rewrite' => true,
		// 'capability_type' => 'post',
		'capabilities' => array(
			'publish_posts' => 'manage_options',
			'edit_posts' => 'manage_options',
			'edit_others_posts' => 'manage_options',
			'delete_posts' => 'manage_options',
			'delete_others_posts' => 'manage_options',
			'read_private_posts' => 'manage_options',
			'edit_post' => 'manage_options',
			'delete_post' => 'manage_options',
			'read_post' => 'manage_options',
    	),
		'has_archive' => true,
		'hierarchical' => false,
		'menu_position' => 5,
		'rewrite' => array( 'slug' => 'slider', 'with_front' => false ),
		'supports' => array( 'title', 'editor', 'thumbnail' )
	  );
	 
	register_post_type( 'orbit_slider' , $args );
}

function SliderContent(){

	$args = array( 'post_type' => 'orbit_slider', 'order' => 'ASC' );
	$loop = new WP_Query( $args );
	
	while ( $loop->have_posts() ) : $loop->the_post();
	
		$slider_link = get_field('slider_image_links_to');
		foreach ( $slider_link as $post_object ): ?>
	
			<?php echo '<a href="'.get_permalink($post_object->ID) .'">';
				if ( has_post_thumbnail() ) {  the_post_thumbnail( 'slider-image-large' ); } ?>
				<div class="orbit-caption">
					<h1><?php the_title(); ?></h1>
					<?php the_content(); ?>
				</div>
			<?php echo '</a>'; ?>
			
		<?php endforeach; 
	endwhile;
}
// Remove menu item if not admin
function wpse28782_remove_menu_items() {
    if( !current_user_can( 'administrator' ) ):
        remove_menu_page( 'edit.php?post_type=orbit_slider' );
    endif;
}
add_action( 'admin_menu', 'wpse28782_remove_menu_items' );