<div class="std-each-custom-field">
    <label for="std_custom_field_<?php echo esc_attr($field_key); ?>" class="sr-only std-hidden-item"><?php echo esc_html($field_label); ?></label>
    <input type="url" name="<?php echo esc_attr($field_name) ?>" id="std_custom_field_<?php echo esc_attr($field_key); ?> " class="std-name std-rounded" placeholder="<?php echo esc_attr($field_label); ?>" data-field-key="<?php echo esc_attr($field_key); ?>">
</div>