You can simply use JavaScript if you display the page in a webview:
NSString *innerTextOfSpan = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById('ctl06_ctl06_spDailySMSSection').innerText"];
If you do not intend to display the web site anyway, I highly suggest going with stavash answer.
If the page structure is simple enough, a simple Regex might work.