Hello liancung ,
To Slogan text changing iPhone and Handheld device
Find this code at templates/ja_purity_ii/layouts/blocks/iphone/header.php , Here you can change your slogan as per you requirement .
<?php else:
$logoText = (trim($this->getParam(‘logoType-text-logoText’))==”) ? $config->sitename : $this->getParam(‘logoType-text-logoText’);
$sloganText = (trim($this->getParam(‘logoType-text-sloganText’))==”) ? JText::_(‘SITE SLOGAN’) : $this->getParam(‘logoType-text-sloganText’);?>
<div class=”logo-text”>
<h1><a href=”index.php” title=”<?php echo $siteName; ?>”><span><?php echo $logoText; ?></span></a></h1>
<p class=”site-slogan”><?php echo $sloganText;?></p>
</div>
<?php endif; ?>
change the word ‘SITE SLOGAN’ .