Is it possible to change the url of one webview later in another function by using the specified tag?

AppViewController.m

for( int i = 0; i < 4; i++ ) {
        UIWebView *wview;
        int wx;
        if (i < 2) {
            wx = 12;
        } else {
            wx = 512;
        }

        wview = [[UIWebView alloc] initWithFrame:CGRectMake(wx, 16, 500, 716)];
        [wview setTag:i];
        
        NSLog(@"Set webview to: %@", xpath);
        NSURL *xurl = [NSURL fileURLWithPath:xpath isDirectory:NO];
        
        NSURLRequest *request=[NSURLRequest requestWithURL:xurl];
        [wview loadRequest:request];
        
        //set the web view delegates for the web view to be itself
        [wview setDelegate:self];
        [self.view addSubview:wview];
      
        [wview release];
    }