As i said, they made it so you couldn't dip here and there.

there are other ways to gain class benifits, and those are the multiclass feats
Initiate of the Faith Wis 13 Cleric: Religion skill, healing word 1/day
Student of the Sword Str 13 Fighter: skill training, +1 to attack and mark 1/encounter
Soldier of the Faith Str 13, Cha 13 Paladin: skill training, divine challenge 1/encounter
Warrior of the Wild Str 13 or Dex 13 Ranger: skill training, designate prey 1/encounter
Sneak of Shadows Dex 13 Rogue: Thievery skill, Sneak Attack 1/encounter
Pact Initiate Cha 13 Warlock: skill training, eldritch blast 1/encounter
Student of Battle Str 13 Warlord: skill training, inspiring word 1/day
Arcane Initiate Int 13 Wizard: Arcana skill, wizard power 1/encounter

Class-Specific Feats
There are two restrictions on your choice of a
class-specific multiclass feat. First, you can’t take a
multiclass feat for your own class. Second, once you
take a multiclass feat, you can’t take a class-specific
feat for a different class. You can dabble in a second
class but not a third.
A character who has taken a class-specific multiclass
feat counts as a member of that class for the purpose of
meeting prerequisites for taking other feats and qualifying
for paragon paths. For example, a character who
takes Initiate of the Faith counts as a cleric for the purpose
of selecting feats that have cleric as a prerequisite.
These feats can qualify you for other feats; for example,
a warlock who takes Sneak of Shadows can use the
rogue’s Sneak Attack class feature, which means that
he meets the prerequisite for the Backstabber feat.