Show only Testimonial's category

When i create a custom post,All Category show hare.But i want to show only custom post category here is my code.

[ Moderator note: Code fixed, please wrap code in backticks or use the code button. ]

/*Add Custom Post*/
add_action('init', 'register_mypost_type');
function register_mypost_type() {
register_post_type('people',
		array(	'label' => 'Testimonials',
				'public' => true,'show_ui' => true,
				'show_in_menu' => true,
				'capability_type' => 'post',
				'hierarchical' => false,
				'rewrite' => array('slug' => ''),
				'query_var' => true,
				'has_archive' => true,
				'supports' => array('title','editor','thumbnail',),
				'taxonomies' => array('category', 'post_tag'),
				'menu_position' => 5,
				) );
}

/*Add Custom Post*/