<?php
$wp_customize->add_section('borno_footer', array(
    'title'         => __('Footer', 'borno'),
    'panel'         => 'borno',
    'priority'      => 2,
));

$wp_customize->add_setting('borno_footer_credit_settings', array(
    'capability'        => 'edit_theme_options',
    'transport'         => 'refresh',
    'type'              => 'theme_mod',
    'sanitize_callback' => 'sanitize_textarea_field'
));
$wp_customize->add_control('borno_footer_credit_ctrl', array(
    'label'             =>  __('Footer Credit', 'borno'),
    'section'           =>  'borno_footer',
    'settings'          =>  'borno_footer_credit_settings',
    'type'              =>  'text'
));