public function manage_columns( $column, $post_id ) {

		$lesson = llms_get_post( $post_id );
		if ( ! $lesson ) {
			return;
		}

		switch ( $column ) {

			case 'course':
				$course    = $lesson->get( 'parent_course' );
				$edit_link = get_edit_post_link( $course );

				if ( ! empty( $course ) && get_post( $course ) ) {
					printf( '<a href="%1$s">%2$s</a>', esc_url( $edit_link ), esc_html( get_the_title( $course ) ) );
				}

				break;

			case 'section':
				$section = $lesson->get_parent_section();
				if ( ! empty( $section ) ) {
					echo esc_html( get_the_title( $section ) );
				}

				break;

			case 'prereq':
				if ( $lesson->has_prerequisite() ) {

					$prereq    = $lesson->get( 'prerequisite' );
					$edit_link = get_edit_post_link( $prereq );

					if ( $prereq ) {

						printf( '<a href="%1$s">%2$s</a>', esc_url( $edit_link ), esc_html( get_the_title( $prereq ) ) );

					} else {

						echo '&ndash;';

					}
				} else {

					echo '&ndash;';

				}

				break;

			case 'quiz':
				$course = $lesson->get( 'parent_course' );
				$url    = add_query_arg(
					array(
						'page'      => 'llms-course-builder',
						'course_id' => $course,
					),
					admin_url( 'admin.php' )
				);
				$url   .= sprintf( '#lesson:%d:quiz', $post_id );

				if ( $lesson->has_quiz() ) {

					$label = __( 'Edit Quiz', 'lifterlms' );

				} else {

					$label = __( 'Add Quiz', 'lifterlms' );

				}

				echo '<a href="' . esc_url( $url ) . '">' . esc_html( $label ) . '</a>';

				break;

		}
	}