Banner completely clickable

Hi,
I hope you can help me out with this. I like your Banner very much. But, I like to have the text including the overlay to be clickable as well. Like it’s one block. (look at this page, and you understand what I mean. I’m not a PHP programmer but I know a bit about it. I would like to change your PHP-script a bit at my side to get it working. I hope you can help me change the code and put it back in the answer. I don’t need the ‘call to action’ by the way…

// generate the html now
		$html .= '<div class="banner_wrapper" '. $banner_display .'>';
			$html .= '<div class="banner ' . $extra_classes_str . '" style="' . $banner_style . '">';
				if($use_big_link){
					$html .= '<a class="custom_banners_big_link" ' . $link_target . ' href="' . $target_url . '"></a>';
				}
				$html .= $img_html;
				$caption = $banner->post_content;
				if (strlen($caption) > 0 || strlen($cta) > 0)
				{
					$html .= '<div class="banner_caption">';
						$html .= $caption;
						if (strlen($cta) > 0)
						{
							$html .= '<div class="banner_call_to_action">';
								$html .= '<a href="' . $target_url . '" ' . $link_target . ' class="banner_btn_cta">' . htmlspecialchars($cta) . '</a>';
							$html .= '</div>'; //<!--.banner_call_to_action-->
						}
					$html .= '</div>'; //<!--.banner_caption-->
				}
			$html .= '</div>'; //<!--.banner -->
		$html .= '</div>'; //<!--.banner_wrapper-->

		return $html;
	}

Hope you can help me…

Thanx,
Jeroen,
The Netherlands

https://www.ads-software.com/plugins/custom-banners/