Change image to text

I have this theme and the home icon does not work i want to change the home icon to text that says home how do i do this i have located the nav.php file to do this but i dont know want to change? `<?php
/*

Section: Navigation
Author: Tyler Cunningham
Description: Creates site navigation
Version: 0.1

*/

$homeimage = get_option(‘if_menuicon’) ? ”: ‘default’;

?>

<div id=”navbackground”>

<div id=”navcontainer”>

<?php if ($homeimage == ‘default’ ):?>
<div id=”homebutton”><a href=”<?php echo home_url(); ?>/”><img src=”<?php echo get_template_directory_uri(); ?>/images/homebutton.png?>” alt=”Home” /></a></div>
<?php endif;?>
<?php if ($homeimage != ‘default’ ):?>
<div id=”homebutton”><a href=”<?php echo home_url(); ?>/”><img src=”<?php echo $homeimage?>” alt=”Home” /></a></div>
<?php endif;?>
<div id=”searchbar”>
<?php get_search_form(); ?>
</div>
<div id=”sfwrapper”>
<?php wp_nav_menu( array(
‘theme_location’ => ‘header-menu’, // Setting up the location for the main-menu, Main Navigation.
‘menu_class’ => ‘sf-menu’, //Adding the class for dropdowns
‘container_id’ => ‘navwrap’, //Add CSS ID to the containter that wraps the menu.
‘fallback_cb’ => ‘ifeature_menu_fallback’, //if wp_nav_menu is unavailable, WordPress displays wp_page_menu function, which displays the pages of your blog.
)
);
?>
</div>

</div><!–end navcontainer–>

</div>
<!–end nav.php–>`