Custom Post Types Template Init

cpt-template-init.php

<?php 
public function init() {
    	add_action( 'add_meta_boxes', array( &$this, 'register_meta_boxes' ) );
		$labels = array(
			'name'               => 'Galleries',
			'singular_name'      => 'Gallery',
			'menu_name'          => 'Galleries',
			'name_admin_bar'     => 'Galleries',
			'add_new'            => 'Add New',
			'add_new_item'       => 'Add New Gallery',
			'new_item'           => 'New Gallery',
			'edit_item'          => 'Edit Gallery',
			'view_item'          => 'View Gallery',
			'all_items'          => 'All Galleries',
			'search_items'       => 'Search Galleries',
			'parent_item_colon'  => 'Parent Gallery:',
			'not_found'          => 'No Galleries found.',
			'not_found_in_trash' => 'No Galleries in trash.'
		);
		register_post_type( 'gallery', array(
			'public'        => true,
			'label'         => 'Galleries',
			'labels'        => $labels,
			'hierarchical'  => false,
			'menu_position' => 20,
			'menu_icon'     => 'dashicons-format-image',
			'supports'      => array( 'title', 'page-attributes' ),
			'has_archive'   => true,
			'rewrite'       => array(
				'slug'       => 'gallery',
				'with_front' => false,
			)
		) );
		
		$labels = array(
			'name'               => 'Books',
			'singular_name'      => 'Book',
			'menu_name'          => 'Books',
			'name_admin_bar'     => 'Books',
			'add_new'            => 'Add New',
			'add_new_item'       => 'Add New Book',
			'new_item'           => 'New Book',
			'edit_item'          => 'Edit Book',
			'view_item'          => 'View Book',
			'all_items'          => 'All Books',
			'search_items'       => 'Search Books',
			'parent_item_colon'  => 'Parent Book:',
			'not_found'          => 'No Books found.',
			'not_found_in_trash' => 'No Books in trash.'
		);
		register_post_type( 'book', array(
			'public'        => true,
			'label'         => 'Books',
			'labels'        => $labels,
			'hierarchical'  => false,
			'menu_position' => 20,
			'menu_icon'     => 'dashicons-format-aside',
			'supports'      => array( 'title', 'page-attributes' ),
			'has_archive'   => true,
			'rewrite'       => array(
				'slug'       => 'book',
				'with_front' => false,
			)
		) );
	}