How to output slug from product_cat as text in wordpress loop?

Question

WordPress

It is necessary to display information from slug (label) from product_cat (Products->Categories, Wordpress) as text in order for Cyrillic tabs on the site page to work correctly. I broke my whole head, but I can’t figure out how to do it. Output should be in this place: href="# after the # element. The current code drags the name of the category.

<div class="row">

        <div class="col-12">
            <ul class="nav tab-navigation justify-content-center">
                <?php
                $i = 1;
                if (is_array($product_cat)) {
                    
                foreach ( $product_cat as $value ) {
                    if($i <= 20) {
                
                            // $category[] = $value->slug;
                            if( $i == 1 ){ ?>
                                <li class="nav-item">
                                    <a class="nav-link active" href="#<?php echo $value;?>" data-toggle="pill"><?php echo $value;?></a>
                                </li>
                            <?php }else{ ?>
                                <li class="nav-item">
                                    <a class="nav-link" href="#<?php echo $value;?>" data-toggle="pill" ><?php echo $value;?></a>
                                </li>
                            <?php }
                        }
                        $i++;
                    }
                    # code...
                }
                ?>
            </ul>
        </div><!--/.col-12-->

        <div class="col-12">
            <div class="tab-content" id="pills-tabContent">
            
                <?php 
                $i=1;
                if (is_array($product_cat)) {
                foreach ($product_cat as $value) {
                    if( $i == 1){ ?>
                    <div class="tab-pane fade show active" id="<?php echo $value;?>">
                    <?php }else{?>
                    <div class="tab-pane fade" id="<?php echo $value;?>">
                    <?php } $i++; ?>  

                        <?php

Answer 1

Well, you have everything.
$value->slug
What's wrong?