ACF advanced custom fields select in a repeater field to choose content layout or, anything else, within a wordpress page.

selector.php

    <?php if (get_field('page_content_repeater')) { ?>
	<?php while (the_repeater_field('page_content_repeater')): ?>
	    <?php
	    /* Pull from users select choice in ACF */
	    $choice1 = 'string_1';
	    $choice2 = 'string_2';
	    ?>
	    <?php if (get_sub_field('your_selection_field') === $choice1) { ?>
		<!--Your Content-->
	    <?php } elseif (get_sub_field('your_selection_field') === $choice2) { ?>
		<!--Your alternate Content-->
	    <?php } ?>
	<?php endwhile; ?>
    <?php } else { ?>
	<?php the_content(); ?>
    <?php } ?>