<div class="block-addon tabs-wrapper">
                <ul role="tablist" class="nav nav-tabs">
                <?php 
$i = 0;
while (have_rows('tabs')) {
    the_row();
    ?>
                    <li role="presentation" class="tab-<?php 
    fcb_the_block_id(get_sub_field('navigation_title'));
    ?>
 <?php 
    fcb_is_active($i);
    ?>
">
                        <a href="#tab-<?php 
    fcb_the_block_id(get_sub_field('title'));
    ?>
" aria-controls="<?php 
    get_sub_field('title');
    ?>
" role="tab" data-toggle="tab">
                            <span>
                                <?php 
    the_sub_field('navigation_title');
    ?>
                            </span>
                        </a>
                    </li>

                <?php 
    $i++;
            <div class="block-addon tab-content">
            <?php 
$i = 0;
while (have_rows('tabs')) {
    the_row();
    ?>

                <div role="tabpanel" class="tab-pane fade <?php 
    fcb_is_active($i, 'in');
    ?>
 tab-<?php 
    fcb_the_block_id(get_sub_field('navigation_title'));
    ?>
" id="tab-<?php 
    fcb_the_block_id(get_sub_field('title'));
    ?>
"  style="<?php 
    fcb_block_wrapper_styles();
    ?>
">
                    <?php 
    cfb_template('blocks/parts/tabs/tabs-content', get_row_layout());
    ?>
                </div>

            <?php 
    $i++;
}
?>
            </div>