Hidaayah is of three types

[dkSadiq.ibn.Owodunni]

JazaakAllaahu khayraa yaa Ustaadh wa baarakAllaahu feek.

1) Negating the Prophet صلى الله عليه وسلم guiding:

إِنَّكَ لَا تَهْدِي مَنْ أَحْبَبْتَ وَلَٰكِنَّ اللَّهَ يَهْدِي مَن يَشَاءُ وَهُوَ أَعْلَمُ بِالْمُهْتَدِينَ
{Verily! You (O Muhammad صلى الله عليه وسلم) guide not whom you like, but Allah guides whom He wills. And He knows best those who are the guided.}

Type: التوفيق لقبول الحق والثبات عليه [Success in accepting the truth and being firm upon it]

2) Affirming the Prophet صلى الله عليه وسلم guiding:

وَإِنَّكَ لَتَهْدِي إِلَىٰ صِرَاطٍ مُّسْتَقِيمٍ
{And verily, you (O Muhammad صلى الله عليه وسلم) are indeed guiding (mankind) to the Straight Path (i.e. Allah's religion of Islamic Monotheism).}

Type: الإرشاد والتعليم والدلالة (Direction, teaching, giving evidence)

3) The second verse (and others similar to it) affirm that the Prophet صلى الله عليه وسلم "guides" meaning, he teaches, directs and shows to others the Straight Path but this does not mean that he is able to cause the people to accept the guidance (or remain firm upon it) - rather it is only Allah alone that "guides" a person so that he accepts the truth and remains firm upon it - may Allah make us of those.

Brother Abu 'Abdul-Raheem (may Allah reward him) mentioned the example of the Prophet's صلى الله عليه وسلم uncle - whom the Prophet صلى الله عليه وسلم guided by showing him the truth and directing him to it but whom he صلى الله عليه وسلم could not guide to accepting the truth - as that is for Allah alone.

4) Perhaps, the fourth you are referring to is guidance to the bridge to Paradise in the Hereafter? Although, I can't recollect / don't know a text that supports this.