public function set_instructors( $instructors = array() ) {

		$instructors = $this->pre_set_instructors( $instructors );

		// Set the post_author to be the first author in the array.
		$this->post->set( 'author', $instructors[0]['id'] );

		// Save the instructors array.
		$this->post->set( 'instructors', $instructors );

		return $instructors;

	}