You can try looping to match the category name you need.
$categories = get_the_category();
$category_name="foo1"; // set this to the category name you want to show
$output="";
if($categories){
foreach($categories as $category)
{
if ( $category_name == $category->cat_name)
{
$output .='<div class="category-custom-class">'.$category->cat_name.'</div>';
}
else
{
$output .='<div class="category-custom-class1">'.$category->cat_name.'</div>';
}
}
echo $output;
}