page-content.php

<?php

add_filter( 'the_content', 'filter_the_content_in_the_main_loop' );

function filter_the_content_in_the_main_loop( $content ) {
    $first_lesson_link = lco_get_content_structure()[0]->lessons[0]->link;

    ob_start();
    ?>
    <div class="center-elements">
        <a href="<?= $first_lesson_link ?>" class="lco-button-c2a-2 mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect mdl-button--primary">
            <?= __('START NOW', LCO_THEME) ?>
        </a>
    </div>
    <?php
    $output = ob_get_contents();
    ob_end_clean();

    return $content.$output;
}


genesis();