In your .htaccess you can add:
PHP 5.x
php_value memory_limit 64M
PHP 7.x
php_value memory_limit 64M
If page breaks again, then you are using PHP as mod_php in apache, but error is due to something else.
If page does not break, then you are using PHP as CGI module and therefore cannot use php values - in the link I've provided might be solution but I'm not sure you will be able to apply it.
Read more on http://support.tigertech.net/php-value