well solved it by adding two methods in RMMarker class
-(void)showMarker{
[self setHidden:NO];
}
-(void)hideMarker{
[self setHidden:YES];
}
And finally iterate through marker manager
NSArray* markers = markerManager.markers;
for(RMMarker *mk in markers)
{
if ([mk isKindOfClass:[RMMarker class]]&&[mk.accessibilityLabel isEqual:@"xyz"])
{
[mk showMarker];
}
}
similarly u can do the same for RMPath class