Zen Cart automatically makes an <h1> heading for each page, using the category name, page name, etc. You are not supposed to have two <h1> tags on one page.
However, if you want to change the tagline, you could wrap an if() test around the HEADER_SALES_TEXT define and provide alternate defines based on the category.
Something like
PHP Code:
if ((int)$cPath ==12) {
define('HEADER_SALES_TEXT', 'The Hustlelusion, Fashion Belts by Designer X!');
}elseif((int)$cPath ==13) {
define('HEADER_SALES_TEXT', 'The Hustlelusion, Mens Belts of High Quality Leather!');
}elseif((int)$cPath ==14) {
define('HEADER_SALES_TEXT', 'The Hustlelusion, Stretch Belts that fit you!');
}else{
define('HEADER_SALES_TEXT', 'The Hustlelusion, Fashion Belts, Mens Belts, Stretch Belts, and Leather Belts at an Affordable Price!');
This will change the tagline based on the current top category.
The last statement is a catchall for any page you do not have individually defined.