Fatal error – functions.php

Hi everyone! I’m new in wordpress and so far I managed to build up my website (Lionball) without modifying the code by myself (I always used plugins in order to avoid it) since I really have no idea about coding.

However, yesterday I felt brave enough to modify the code for the first time… You can imagine I screwed-up my whole website… I basically thought that copying the following code (found here) and pasting it twice in my functions.php I could add two links in my tagline rather than only one…

add_filter( 'tc_tagline_display' , 'my_link_in_tagline');

function my_link_in_tagline() {
	global $wp_current_filter;
	?>
		<?php if ( !in_array( '__navbar' , $wp_current_filter ) )  :?>
			<div class="container outside">
		        <h2 class="site-description">
		        	<?php bloginfo( 'description' ); ?>
		        	<a href="[PUT YOUR URL HERE]" title="[A TITLE]">My link</a>
		        </h2>

		    </div>
		<?php else : //when hooked on __navbar ?>
			<h2 class="span7 inside site-description">
	            <?php bloginfo( 'description' ); ?>
	            <a href="[PUT YOUR URL HERE]" title="[A TITLE]">My link</a>
	        </h2>

		<?php endif; ?>
	<?php
}

That ended up terribly bad and now the following error appears everywhere, my website doesn’t work at all and I cannot even access to my dashboard:

Fatal error: Cannot redeclare my_link_in_tagline() (previously declared in /home/lionball/public_html/wp-content/themes/customizr/functions.php:63) in /home/lionball/public_html/wp-content/themes/customizr/functions.php on line 104

Any ideas how can I undo that or at least delete that second copy of the code that I added? I’m really sorry for asking this, but I just found myself in this big mess and don’t know how to fix it…

Thank you very much for reading!!